Vulnerability database

1,091 results · page 1 of 22

• Oct 17, 2026Admidio from 5.0.0 before 5.0.16 contains an insecure direct object reference vulnerability in ForumService::saveTopic() that allows authenticated members to moCVE-2026-111912 · Other software · Admidio · reported by VulnCheckHigh 7.1

  Admidio from 5.0.0 before 5.0.16 contains an insecure direct object reference vulnerability in ForumService::saveTopic() that allows authenticated members to modify other users' forum topics. Attackers can replace the topic_uuid parameter in their own topic_save request, reusing their CSRF token, to overwrite the victim topic's title and first post.

  Product

  admidio

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comvulncheck.com

• Oct 16, 2026Cross Site Scripting vulnerability in InstantASP ltd, InstantForum.NET v.4.1.4 allows an attacker to execute arbitrary code via reflecting un-sanitized input frCVE-2025-52097 · Other software · reported by MITRE

  Cross Site Scripting vulnerability in InstantASP ltd, InstantForum.NET v.4.1.4 allows an attacker to execute arbitrary code via reflecting un-sanitized input from query string parameters directly into the HTML response without proper output encoding

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordinstantasp.cominstantforumnet.com

• Oct 14, 2026bbPress before 2.6.19 contains an information disclosure vulnerability that allows unauthenticated visitors to view restricted subforum posts because hide_sitewCVE-2026-110762 · WordPress plugins & themes · reported by VulnCheckMedium 6.3

  bbPress before 2.6.19 contains an information disclosure vulnerability that allows unauthenticated visitors to view restricted subforum posts because hide_sitewide ignores ancestor forum visibility. Topics and replies in public subforums nested under private or hidden parents expose title, permalink and body via the BuddyPress activity stream and REST endpoint.

  Fixed in

  2.6.19

  What to do

  Update the plugin to 2.6.19 or newer.

  Full record and what to do →NVD recordbbpress.orggithub.com

• Oct 9, 2026Asgaros Forum: Missing AuthorizationCVE-2026-39779 · WordPress plugins & themes · reported by PatchstackMedium 4.3

  Missing Authorization vulnerability in Asgaros Asgaros Forum asgaros-forum allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Asgaros Forum: from n/a through 3.4.0.

  Product

  Asgaros Forum

  Affected

  up to 3.4.0

  What to do

  Affects up to 3.4.0. Update Asgaros Forum to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.

  Full record and what to do →NVD recordpatchstack.com

• Oct 8, 2026Jivejdon through 5.0 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject script by posting unsanitized forum messCVE-2026-107799 · Other software · banq · reported by VulnCheckMedium 5.1

  Jivejdon through 5.0 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject script by posting unsanitized forum message bodies. Message bodies are rendered by messageListBody.jsp with filter="false" and non-escaping default filters, executing script in the browser of every user viewing the thread.

  Product

  jivejdon

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Oct 8, 2026Jivejdon from commit d58a36b0 through commit ee67a65e contains a missing authorization vulnerability in UpdateThreadToForumAction that allows authenticated userCVE-2026-107792 · Other software · banq · reported by VulnCheckMedium 5.3

  Jivejdon from commit d58a36b0 through commit ee67a65e contains a missing authorization vulnerability in UpdateThreadToForumAction that allows authenticated users to move other users' threads. Attackers can send crafted threadId and forumId values to /message/threadToForum/save to relocate any reply-less thread into an arbitrary forum.

  Product

  jivejdon

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Oct 6, 2026Cross-site Scripting (XSS) in the Forums feature of OpenText Content Management Content Server could allow a bad actor to inject malicious code into a Forums weCVE-2025-15591 · Other software · OpenText · reported by security@opentext.comMedium 5.3

  Cross-site Scripting (XSS) in the Forums feature of OpenText Content Management Content Server could allow a bad actor to inject malicious code into a Forums web page.

  Product

  Content Management

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordsupport.opentext.com

• Sep 30, 2026Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki WikiForum extension allows StoCVE-2026-103444 · Other software · The Wikimedia Foundation · reported by c4f26cc8-17ff-4c99-b5e2-38fc1793eaccLow 1.1

  Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki WikiForum extension allows Stored XSS. This issue affects MediaWiki WikiForum extension: master.

  Product

  MediaWiki WikiForum extension

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgerrit.wikimedia.orgphabricator.wikimedia.org

• Sep 25, 2026The wpForo Forum WordPress plugin from 3.0.0 before 3.1.6 does not verify the source of client-supplied IP address headers before using them to key its per-visiCVE-2026-80514 · WordPress plugins & themes · reported by WPScanMedium 5.3

  The wpForo Forum WordPress plugin from 3.0.0 before 3.1.6 does not verify the source of client-supplied IP address headers before using them to key its per-visitor rate limit on paid AI requests, allowing unauthenticated attackers to bypass the limit by spoofing the header and exhaust the site owner's metered AI credits.

  Fixed in

  3.1.6

  What to do

  Update the plugin to 3.1.6 or newer.

  Full record and what to do →NVD recordwpscan.com

• Sep 25, 2026wpForo Forum: Stored Cross-Site ScriptingCVE-2026-93747 · WordPress plugins & themes · reported by WordfenceMedium 6.4

  The wpForo Forum plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'telegram' profile field in versions up to, and including, 3.1.6. This is due to insufficient input sanitization and output escaping in the profile_update action — the raw $_POST['data'] array is copied into a $custom_fields variable before validate() and sanitize() run, both of which operate only on a parallel $user reference, leaving $custom_fields unsanitized when it is persisted via update_custom_fields(); on render, wpforo_decode() reverses the entity encoding and the value is echoed without escaping in field_wrap_profile(). This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

  Product

  wpForo Forum

  Affected

  up to 3.1.6

  What to do

  Affects up to 3.1.6. Update wpForo Forum to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.

  Full record and what to do →NVD recordplugins.trac.wordpress.orgplugins.trac.wordpress.org

• Sep 24, 2026wpForo Forum: Does not restrictCVE-2026-80513 · WordPress plugins & themes · reported by WPScanHigh 7.5

  The wpForo Forum WordPress plugin before 3.1.6 does not restrict which classes may be instantiated when it deserializes a user-supplied profile field value, allowing authenticated users with Subscriber-level access and above to inject a PHP Object. No POP chain is present in the wpForo Forum WordPress plugin before 3.1.6 itself; if one is present via another installed wpForo Forum WordPress plugin before 3.1.6 or , this could lead to remote code execution, arbitrary file operations, or SQL injection. This is an incomplete fix of CVE-2026-49769.

  Product

  wpForo Forum

  Fixed in

  3.1.6

  What to do

  Update wpForo Forum to 3.1.6 or newer.

  Full record and what to do →NVD recordwpscan.com

• Sep 23, 2026A security vulnerability has been detected in weiqingwen spring-boot-forum up to 538eecc3c6b85fdf0768ab4e8354b48c0c17d94f.CVE-2026-96678 · Other software · weiqingwen · reported by VulDBLow 2.1

  A security vulnerability has been detected in weiqingwen spring-boot-forum up to 538eecc3c6b85fdf0768ab4e8354b48c0c17d94f. Affected is the function validate of the file src/main/java/com/qingwenwei/util/NewUserFormValidator.java of the component Avatar Upload. The manipulation of the argument Username leads to path traversal. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The vendor was contacted early about this disclosure but did not respond in any way.

  Product

  spring-boot-forum

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comvuldb.com

• Sep 23, 2026Subscriber Cross Site Scripting (XSS) in wpForo Forum <= 3.1.5 versions.CVE-2026-93772 · WordPress plugins & themes · reported by PatchstackMedium 6.5

  Subscriber Cross Site Scripting (XSS) in wpForo Forum <= 3.1.5 versions.

  Affected

  up to 3.1.5

  What to do

  Affects up to 3.1.5. Update the plugin to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.

  Full record and what to do →NVD recordpatchstack.com

• Sep 22, 2026wpForo Forum: Authorization bypassCVE-2026-91092 · WordPress plugins & themes · reported by WordfenceMedium 4.3

  The wpForo Forum plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.1.5. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to take over another guest author's forum post and modify its title, body, author name, and stored owner email address. This requires that guest posting and editing are enabled on the forum, and that the attacker knows the target guest author's email address.

  Product

  wpForo Forum

  Affected

  up to 3.1.5

  What to do

  Affects up to 3.1.5. Update wpForo Forum to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.

  Full record and what to do →NVD recordplugins.trac.wordpress.orgplugins.trac.wordpress.org

• Aug 30, 2026Admidio before 5.0.12 fails to enforce login-only module restrictions in RSS feed endpoints for forum and announcements modules.CVE-2026-82657 · Other software · Admidio · reported by VulnCheckHigh 8.7

  Admidio before 5.0.12 fails to enforce login-only module restrictions in RSS feed endpoints for forum and announcements modules. Unauthenticated attackers can retrieve forum topics and announcements by sending GET requests to rss/forum.php or rss/announcements.php, disclosing titles, full post text, author names, and timestamps.

  Product

  admidio

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comvulncheck.com

• Aug 28, 2026wpForo Forum: SQL InjectionCVE-2026-5097 · WordPress plugins & themes · reported by WordfenceHigh 7.5

  The wpForo Forum plugin for WordPress is vulnerable to SQL Injection via the 'referer' parameter in all versions up to, and including, 2.4.17. This is due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

  Product

  wpForo Forum

  Affected

  up to 2.4.17

  What to do

  Affects up to 2.4.17. Update wpForo Forum to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.

  Full record and what to do →NVD recordplugins.trac.wordpress.orgplugins.trac.wordpress.org

• Aug 26, 2026Simple Machines Forum (SMF) through 2.1.7, fixed in commit 6f0dc61, contains an authorization state-confusion vulnerability in the profile loader that allows auCVE-2026-43621 · Other software · SimpleMachines · reported by VulnCheckHigh 8.6

  Simple Machines Forum (SMF) through 2.1.7, fixed in commit 6f0dc61, contains an authorization state-confusion vulnerability in the profile loader that allows authenticated low-privileged users to gain administrator access by supplying multiple values for the user parameter. Attackers can exploit the mismatch between Profile::$member and User::$me->is_owner during sequential profile loading to be treated as the owner of an administrator profile, enabling unauthorized password changes and full account takeover.

  Product

  SMF

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comvulncheck.com

• Aug 25, 2026A Stored XSS vulnerability in forum reward comments in GazellePW (GazellePosterWall) commit 86c4bedf727691b5a97af42a4864869d18446449 allows remote attackers to CVE-2026-38472 · Other software · reported by MITREMedium 6.1

  A Stored XSS vulnerability in forum reward comments in GazellePW (GazellePosterWall) commit 86c4bedf727691b5a97af42a4864869d18446449 allows remote attackers to inject arbitrary JavaScript via the c parameter in /forums.php?action=ajax_get_jf which is later rendered in the data-tooltip attribute in /forums.php?action=viewthread and interpreted as HTML by the Tooltipster configuration.

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 25, 2026The frontend topic editing flow does not verify on the server side that the requesting visitor owns the topic being modified.CVE-2026-77143 · Other software · TYPO3 · reported by f4fb688c-4412-4426-b4b8-421ecf27b14aHigh 8.8

  The frontend topic editing flow does not verify on the server side that the requesting visitor owns the topic being modified. As a result, a visitor who knows the identifier of a topic from the public forum can submit a modified update request for that topic directly and overwrite its content, without the application confirming ownership. Topic identifiers are visible in the public forum listing, and exploitation requires no privileged access or non-default configuration.

  Product

  Extension "Forum"

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordtypo3.org

• Aug 19, 2026Lemmy is a link aggregator and forum for the fediverse.CVE-2026-54743 · Other software · LemmyNet · reported by GitHubMedium 6.4

  Lemmy is a link aggregator and forum for the fediverse. Prior to lemmy-ui 0.19.19-beta.1, LemmyNet/lemmy-ui renders Markdown in src/shared/markdown.ts for post bodies, comment bodies, private messages, and community and site sidebars through mdToHtml, which returns a raw __html object that Inferno injects without a sanitizer pass. setupMarkdown configures html as false but registers markdown-it-html5-embed@1.0.0 with useImageSyntax enabled, so an image targeting video media becomes a video element whose fallback incorporates the image alt text through unescaped string replacement. The html setting does not apply to plugin-generated output, allowing crafted alt text to reach the DOM as live HTML in contexts that do not use mdToHtmlNoImages. An approved member or a remote federated instance can store such content, and a viewer who renders it may execute JavaScript in the lemmy-ui origin, exposing the viewer's session and authenticated actions. The advisory notes that Content Security Policy prevents the described exploit in production, but also states that the tested default self-hosted deployment serves no Content-Security-Policy. This issue is fixed in lemmy-ui version 0.19.19-beta

  Product

  lemmy

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 19, 2026Lemmy is a link aggregator and forum for the fediverse.CVE-2026-54741 · Other software · LemmyNet · reported by GitHubMedium 5.3

  Lemmy is a link aggregator and forum for the fediverse. Prior to 0.19.19 and 1.0.0-alpha.18, Lemmy blocks new private messages from a sender after the recipient blocks that sender, but the edit path skips the same block check. create_private_message checks the recipient's block list with PersonActions::read_block before inserting a message, while edit_private_message in crates/api/api_crud/src/private_message/update.rs only checks that the caller is orig_private_message.creator_id. The update then writes new content and returns the modified PrivateMessageView without consulting the recipient's block list, allowing a blocked sender to keep changing an old message that the recipient can still see and providing a post-block harassment path. This issue is fixed in versions 0.19.19 and 1.0.0-alpha.18.

  Product

  lemmy

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 19, 2026Lemmy is a link aggregator and forum for the fediverse.CVE-2026-54740 · Other software · LemmyNet · reported by GitHubMedium 6.5

  Lemmy is a link aggregator and forum for the fediverse. Prior to 0.19.19 and 1.0.0-alpha.18, a lower-ranked remote moderator can remove a higher-ranked moderator by sending a signed ActivityPub Remove activity to the target instance. The local API uses LocalUser::is_higher_mod_or_admin_check to enforce moderator rank, but CollectionRemove::verify in crates/apub/activities/src/community/collection_remove.rs only calls verify_mod_action. CollectionRemove::receive dereferences self.object as an ApubPerson, creates a CommunityModeratorForm, and calls CommunityActions::leave without checking that the actor outranks the moderator identified by the object field. In communities with federated moderators, a junior moderator can therefore strip senior moderators from the community moderator list even though the local API rejects the same action. This issue is fixed in versions 0.19.19 and 1.0.0-alpha.18.

  Product

  lemmy

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 19, 2026Lemmy is a link aggregator and forum for the fediverse.CVE-2026-54739 · Other software · LemmyNet · reported by GitHubMedium 6.9

  Lemmy is a link aggregator and forum for the fediverse. Prior to 0.19.19 and 1.0.0-beta.1, Lemmy's login endpoint in crates/api/api/src/local_user/login.rs returns different errors depending on whether the username_or_email value exists. LocalUserView::find_by_email_or_name propagates a NotFound response for an unknown account, while an existing account with a wrong password returns LemmyErrorType::IncorrectLogin. This observable response discrepancy, including HTTP 404 for a nonexistent account and HTTP 400 for an incorrect password on an existing account, allows an unauthenticated attacker to confirm registered usernames or email addresses and use the results for targeted credential attacks or social engineering. This issue is fixed in versions 0.19.19 and 1.0.0-beta.1.

  Product

  lemmy

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 19, 2026Lemmy is a link aggregator and forum for the fediverse.CVE-2026-54738 · Other software · LemmyNet · reported by GitHubMedium 6.5

  Lemmy is a link aggregator and forum for the fediverse. Prior to 0.19.19 and 1.0.0-beta.1, actix-web ConnectionInfo::realip_remote_addr reads the first value of X-Forwarded-For as the client address used by raw_ip_key in crates/utils/src/rate_limit/mod.rs. Lemmy's bundled docker/nginx.conf uses $proxy_add_x_forwarded_for instead of $remote_addr, which appends the real client address to an X-Forwarded-For value supplied by the client. An unauthenticated attacker can therefore place a different spoofed address first on each request and receive a new rate-limit bucket, bypassing limits on POST /api/v4/account/auth/register, POST /api/v4/account/auth/login, POST /api/v4/post, POST /api/v4/comment, GET /api/v4/search, POST /api/v4/image, and POST /api/v4/account/import_settings. This permits excessive account creation, brute-force attempts, spam, scraping, uploads, and repeated imports. This issue is fixed in versions 0.19.19 and 1.0.0-beta.1.

  Product

  lemmy

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 19, 2026Lemmy is a link aggregator and forum for the fediverse.CVE-2026-54742 · Other software · LemmyNet · reported by GitHubMedium 5.1

  Lemmy is a link aggregator and forum for the fediverse. From 0.19.18 until 0.19.19 and 1.0.0-alpha.20, a community moderator can feature or unfeature posts in other communities through federated CollectionAdd and CollectionRemove activities using CollectionType::Featured. After verify_mod_action authorizes the actor against self.community(), the receive handlers in crates/apub/activities/src/community/collection_add.rs and crates/apub/activities/src/community/collection_remove.rs dereference self.object as an ApubPost and update featured_community without verifying that post.community_id equals community.id. A moderator can therefore target an unrelated post owned by another community, push it into featured feeds and listings, or undo another community's legitimate curation decision. This issue is fixed in versions 0.19.19 and 1.0.0-alpha.20.

  Product

  lemmy

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-47245 · Other software · mybb · reported by GitHubMedium 4.3

  MyBB is free and open source forum software. Prior to 1.8.40, the User CP Buddy/Ignore List component does not validate reciprocal buddy-list updates correctly. The usercp.php?action=do_editlists delete handler removes the selected entry from the acting user's list and then updates mybb_users.buddylist for the target account. The reciprocal update searches for the deleted target UID instead of the acting user's UID and uses the unchecked array_search() return value as an array key. A false result can be converted to index 0, removing the target account's first stored buddy while leaving the actual reciprocal entry unchanged. The uniquely identifying implementation details include false converted to index 0. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-45734 · Other software · mybb · reported by GitHubMedium 5.3

  MyBB is free and open source forum software. Prior to 1.8.40, the built-in CAPTCHA does not consistently enforce single-use semantics, allowing remote attackers to bypass CAPTCHA controls through challenge replay. The successful validation paths in contact.php, member.php?action=do_resendactivation, member.php?action=do_lostpw, member.php?action=do_emailuser, and sendthread.php?action=do_sendtofriend do not call captcha::invalidate_captcha() for the MyBB Default CAPTCHA selected by the captchaimage setting. A valid response can therefore be reused until a non-vulnerable endpoint invalidates it, an incorrect response is submitted, or the challenge expires. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-45129 · Other software · mybb · reported by GitHubMedium 4.6

  MyBB is free and open source forum software. Prior to 1.8.40, the Admin CP Recovery Codes module does not validate requests correctly, allowing same-site attackers to rotate a victim administrator's recovery codes with a specially crafted URL. The Admin CP Home, Preferences, Recovery Codes action=recovery_codes page regenerates Two-Factor Authentication recovery codes in mybb_adminoptions.recovery_codes on GET requests without request forgery protection. The uniquely identifying implementation details include admin/modules/home/preferences.php. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-45128 · Other software · mybb · reported by GitHubLow 3.5

  MyBB is free and open source forum software. Prior to 1.8.40, the ACP Users View Manager module does not validate requests correctly, allowing same-site attackers to change a victim administrator's default user list view by embedding a specially crafted URL. The Set as Default control named set_default in Admin CP, Users & Groups, Users, View Manager changes the administrator's default view on GET requests without request forgery protection. The uniquely identifying implementation details include Users & Groups → Users → View Manager, and admin/inc/functions_view_manager.php. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-45127 · Other software · mybb · reported by GitHubLow 3.5

  MyBB is free and open source forum software. Prior to 1.8.40, the ACP Mass Mail module does not validate certain requests correctly, allowing same-site attackers to create draft entries from archived entries by embedding a specially crafted URL. The Resend route in Admin CP, Users & Groups, Mass Mail, Mass Mailing Archive duplicates archived mailing entries into new drafts with mybb_massemails.status set to 0 on GET requests without request forgery protection. The uniquely identifying implementation details include Users & Groups → Mass Mail → Mass Mailing Archive, mybb_massemails.status = 0, and admin/modules/user/mass_mail.php. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-45126 · Other software · mybb · reported by GitHubLow 3.5

  MyBB is free and open source forum software. Prior to 1.8.40, the Admin CP Security Questions module does not validate the anti-CSRF token correctly, allowing same-site attackers to enable or disable registration challenge questions with a specially crafted URL. The controller processes GET requests for the disable and enable actions to modify mybb_questions.active without verifying the my_post_key token attached by the user interface. The uniquely identifying implementation details include admin/modules/config/questions.php. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-45125 · Other software · mybb · reported by GitHubMedium 5.3

  MyBB is free and open source forum software. Prior to 1.8.40, the Email User controller does not sanitize sender names correctly, resulting in mail header injection. member.php?action=do_emailuser accepts the fromname HTTP parameter for guests or the stored username for authenticated users when the cansendemail group permission is enabled. When mail_handler is set to the default PHP mail value, the sender name is used without sanitization in Return-Path and Reply-To headers, allowing arbitrary headers to be injected with CRLF sequences. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-45124 · Other software · mybb · reported by GitHubMedium 4.3

  MyBB is free and open source forum software. Prior to 1.8.40, the Mod CP Report Center does not check permissions consistently, allowing moderators without report-management permission to mark reports as resolved. The modcp.php?action=do_reports Mark Selected as Read handler is reachable with canmodcp even without canmanagereportedcontent or canmanagereportedposts. When no forums are in scope, $flist_reports is empty and the UPDATE mybb_reportedcontent query executes without the expected permission-based limitation. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-45123 · Other software · mybb · reported by GitHubMedium 4.3

  MyBB is free and open source forum software. Prior to 1.8.40, the remote requests feature does not correctly handle IPv6 addresses, resulting in a server-side request forgery vulnerability. The default disallowed remote hosts list does not include IPv6 addresses. Verification in fetch_remote_file() fails open when get_ip_by_hostname() returns no result because that function does not return IPv6 results, allowing a crafted remote target to bypass the host restriction. The uniquely identifying implementation details include fail-open verification, and inc/functions.php. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-45122 · Other software · mybb · reported by GitHubMedium 4.3

  MyBB is free and open source forum software. Prior to 1.8.40, the calendar module does not validate moderation permissions for the destination calendar when moving events. A user with moderation permission for the source calendar can move an event to a calendar where the user has only viewing permission because the do_move action in calendar.php does not check canmoderateevents for the target calendar. The uniquely identifying implementation details include calendar event move, source calendar moderation permission, and destination calendar viewing permission. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-45121 · Other software · mybb · reported by GitHubMedium 4.3

  MyBB is free and open source forum software. Prior to 1.8.40, the calendar module does not check permissions consistently when listing calendars, allowing authenticated users to access titles of calendars that are otherwise inaccessible. The affected calendar-selection paths in calendar.php perform permission checks against an invalid calendar context before returning calendar titles. The uniquely identifying implementation details include titles of inaccessible calendars, and invalid calendar permission context. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-45120 · Other software · mybb · reported by GitHubMedium 5.4

  MyBB is free and open source forum software. Prior to 1.8.40, the calendar module does not verify private event status consistently, allowing users with viewing and moderation permissions to access and moderate private events. The private-event check used by get_events() in inc/functions_calendar.php and the event action is missing from the remaining calendar.php actions, despite the limited-access behavior described in inc/languages/english/calendar.lang.php. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-45119 · Other software · mybb · reported by GitHubMedium 4.6

  MyBB is free and open source forum software. Prior to 1.8.40, the Admin CP UTF-8 Conversion module does not validate certain requests correctly, allowing same-site attackers to alter table encoding and deny service with a specially crafted URL. The do=all control flow in admin/modules/tools/system_health.php performs ALTER TABLE operations, column rewrite phases, and fulltext index rebuilds on GET requests for the database table named by the table parameter without request verification. The uniquely identifying implementation details include GET requests without request verification. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-45118 · Other software · mybb · reported by GitHubCritical 9.3

  MyBB is free and open source forum software. Prior to 1.8.40, the Contact module does not validate a redirect URL or protocol correctly, resulting in an open redirect and reflected JavaScript code injection. contact.php accepts the redirect target from the from HTTP parameter in $mybb->input['from'] or the Referer HTTP header in $_SERVER['HTTP_REFERER'] and passes it to redirect() without sufficient verification. A javascript: URI becomes the target of the `Click here if you don't want to wait any longer` link because $force_redirect is true, allowing script execution when a victim selects the link. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-45117 · Other software · mybb · reported by GitHubCritical 9.8

  MyBB is free and open source forum software. From 1.8.13 until 1.8.40, the installer module does not properly escape user-supplied database configuration values written to the configuration file, resulting in PHP code injection and remote code execution when the installer is available. install/index.php processes the values with addcslashes(), but the $characters argument added in MyBB 1.8.13 does not include the backslash character, allowing crafted input to escape the generated PHP string. The uniquely identifying implementation details include introduced in MyBB 1.8.13. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-45116 · Other software · mybb · reported by GitHubHigh 8.7

  MyBB is free and open source forum software. Prior to 1.8.40, the user datahandler does not properly validate checkbox and multiselect profile field types, resulting in stored JavaScript code injection. UserDataHandler::verify_profile_fields() only performs the specialized validation when is_array($profile_fields[$field]) is true. A non-array profile_fields[fidX] value instead of the expected profile_fields[fidX][] shape falls through to generic text handling and is stored without verification. The affected value is then rendered directly by member.php and inc/functions_post.php rather than processed by the MyCode parser. The uniquely identifying implementation details include inc/datahandlers/user.php. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 18, 2026MyBB is free and open source forum software.CVE-2026-45115 · Other software · mybb · reported by GitHubHigh 8.7

  MyBB is free and open source forum software. Prior to 1.8.40, the Buddy/Ignore component does not sanitize usernames correctly, allowing attackers to perform JavaScript code injection through a specially crafted username. The User CP Buddy/Ignore list and the Select Buddies list in Private Messages pass usernames through htmlspecialchars_uni(), which may leave single quotes unescaped. The payload is triggered when a victim chooses Yes in Please Confirm while removing the username in usercp.php, or selects the username through the onclick handler in the xmlhttp.php Select Buddies popup. The uniquely identifying implementation details include Private Messages Select Buddies list, and unescaped single quotes. This issue is fixed in version 1.8.40.

  Product

  mybb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

• Aug 11, 2026A stored cross-site scripting vulnerability in ElkArte Forum 2.0 Beta 1 allows any registered member to inject persistent JavaScript into the profile fields cusCVE-2026-72553 · Other software · ElkArte Forum · reported by 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2cMedium 5.4

  A stored cross-site scripting vulnerability in ElkArte Forum 2.0 Beta 1 allows any registered member to inject persistent JavaScript into the profile fields cust_blurb and cust_locate. The fields are saved without HTML encoding and rendered unescaped in profile views visible to administrators. An attacker can craft a payload that executes in an administrator session, enabling session hijacking or privilege escalation.

  Product

  ElkArte

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.com

• Aug 6, 2026AIL Project contains a stored cross-site scripting vulnerability in the translation controls displayed for chat messages and forum posts.CVE-2026-71447 · Other software · ail-project · reported by 5a6e4751-2f3f-4070-9419-94fb35b644e8Medium 6.9

  AIL Project contains a stored cross-site scripting vulnerability in the translation controls displayed for chat messages and forum posts. The affected templates inserted message and post identifiers directly into inline JavaScript onclick handlers: onclick="translateMessageToPreferredLanguage('{{ message['id'] }}', '{{ mess_id_escape }}', this)" and: onclick="translatePostToPreferredLanguage('{{ post['id'] }}', '{{ post_id_escape }}', this)" These values were HTML-template escaped but were not safely encoded for use as JavaScript string literals inside an HTML attribute. A specially crafted identifier containing quotation marks, escape characters, or other JavaScript syntax could therefore terminate the expected string argument and inject arbitrary JavaScript into the event handler. Because the affected values are associated with indexed chat messages or forum posts, a malicious value may remain stored by AIL and be rendered whenever an analyst accesses the corresponding chat or forum explorer view. Successful exploitation requires the victim to click the affected Translate to preferred language button. The injected code would then execute in the victim’s browser under the s

  Product

  ail-framework

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.com

• Aug 4, 2026A reflected cross-site scripting (XSS) vulnerability in the Forum posting function of O2OA v10 allows attackers to execute arbitrary Javascript in the context oCVE-2026-52370 · Other software · reported by MITREMedium 6.1

  A reflected cross-site scripting (XSS) vulnerability in the Forum posting function of O2OA v10 allows attackers to execute arbitrary Javascript in the context of the victim's browser via a crafted URL.

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.como2oa.net

• Aug 4, 2026wpForo Forum: Does not restrictCVE-2026-12698 · WordPress plugins & themes · reported by WPScanMedium 4.3

  The wpForo Forum WordPress plugin before 3.1.3 does not restrict which profile fields a member may set when editing their own account, allowing users with a subscriber-level account to write administrator-controlled account-state and reputation fields on their own profile, including self-activating a pending or banned account and forging their forum reputation score.

  Product

  wpForo Forum

  Fixed in

  3.1.3

  What to do

  Update wpForo Forum to 3.1.3 or newer.

  Full record and what to do →NVD recordwpscan.com

• Aug 3, 2026Admidio before 5.0.11 contains an authentication bypass vulnerability in the forum module when configured in login-only mode.CVE-2026-69091 · Other software · Admidio · reported by VulnCheckHigh 8.7

  Admidio before 5.0.11 contains an authentication bypass vulnerability in the forum module when configured in login-only mode. The access control logic in modules/forum.php fails to validate the login-only configuration state, allowing unauthenticated attackers to read forum topics and posts by directly accessing the module with read-only parameters.

  Product

  admidio

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comvulncheck.com

• Aug 1, 2026wpForo Forum: Does not sanitize and escape a user profile field before outputting it inside an HTML attribute on the public participant profile pageCVE-2026-12696 · WordPress plugins & themes · reported by WPScanMedium 5.4

  The wpForo Forum WordPress plugin before 3.1.2 does not sanitize and escape a user profile field before outputting it inside an HTML attribute on the public participant profile page, allowing users with a subscriber-level account to inject JavaScript that executes in the browser of any visitor who views the profile, including a logged-in administrator.

  Product

  wpForo Forum

  Fixed in

  3.1.2

  What to do

  Update wpForo Forum to 3.1.2 or newer.

  Full record and what to do →NVD recordwpscan.com

• Jul 31, 2026wpForo Forum: Does not verify that an AI chat conversation belongs to the requesting user before deleting its messagesCVE-2026-12697 · WordPress plugins & themes · reported by WPScanMedium 5.4

  The wpForo Forum WordPress plugin before 3.1.2 does not verify that an AI chat conversation belongs to the requesting user before deleting its messages, allowing users with a subscriber-level account to permanently delete the stored AI chat message history of any other user.

  Product

  wpForo Forum

  Fixed in

  3.1.2

  What to do

  Update wpForo Forum to 3.1.2 or newer.

  Full record and what to do →NVD recordwpscan.com

• Jul 21, 2026FlaskBB is a Forum Software written in Python using the micro framework Flask.CVE-2026-46556 · Other software · flaskbb · reported by GitHubMedium 6.5

  FlaskBB is a Forum Software written in Python using the micro framework Flask. Prior to version 2.2.1, a Server-Side Request Forgery (SSRF) vulnerability in get_image_info() allows any authenticated user to force the server to send HTTP requests to arbitrary internal endpoints, including cloud metadata services. This is a blind SSRF with confirmed internal port scanning and internal API triggering capabilities. Version 2.2.1 patches the issue.

  Product

  flaskbb

  What to do

  Apply the vendor’s update. The NVD record links to the advisory.

  Full record and what to do →NVD recordgithub.comgithub.com

Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.