Updated 34 min ago

Vulnerability database

Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.

1,762exploited flaws on CISA’s list

34added in the last 30 days

353new WordPress flaws this week

390,080entries in the database

126 results · page 2 of 3

Oct 2, 2024Synacor Zimbra Collaboration Suite (ZCS) Command Execution VulnerabilityCVE-2024-45519 · Email & office · Synacor · reported by MITREExploitedCritical 10
Synacor Zimbra Collaboration Suite (ZCS) contains an unspecified vulnerability in the postjournal service that may allow an unauthenticated user to execute commands.
Product
Zimbra Collaboration Suite (ZCS)
On CISA’s list since
Oct 3, 2024 (federal fix deadline Oct 24, 2024)
What to do
Attackers are using this now. Install Synacor’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog wiki.zimbra.com wiki.zimbra.com
Aug 12, 2024Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) VulnerabilityCVE-2024-27443 · Email & office · Synacor · reported by MITREExploitedMedium 6.1
Zimbra Collaboration contains a cross-site scripting (XSS) vulnerability in the CalendarInvite feature of the Zimbra webmail classic user interface. An attacker can exploit this vulnerability via an email message containing a crafted calendar header, leading to the execution of arbitrary JavaScript code.
Product
Zimbra Collaboration Suite (ZCS)
On CISA’s list since
May 19, 2025 (federal fix deadline Jun 9, 2025)
What to do
Attackers are using this now. Install Synacor’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog wiki.zimbra.com wiki.zimbra.com
Feb 13, 2024Zimbra Collaboration before Kepler 9.0.0 Patch 38 GA allows DOM-based JavaScript injection in the Modern UI.CVE-2023-50808 · Email & office · synacor · reported by MITREMedium 6.1
Zimbra Collaboration before Kepler 9.0.0 Patch 38 GA allows DOM-based JavaScript injection in the Modern UI.
Product
zimbra_collaboration_suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record wiki.zimbra.com wiki.zimbra.com
Jul 31, 2023Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) VulnerabilityCVE-2023-37580 · Email & office · Synacor · reported by MITREExploitedMedium 6.1
Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability impacting the confidentiality and integrity of data.
Product
Zimbra Collaboration Suite (ZCS)
On CISA’s list since
Jul 27, 2023 (federal fix deadline Aug 17, 2023)
What to do
Attackers are using this now. Install Synacor’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog openwall.com wiki.zimbra.com
Jul 6, 2023Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) VulnerabilityCVE-2023-34192 · Email & office · Synacor · reported by MITREExploitedCritical 9
Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting (XSS) vulnerability that allows a remote authenticated attacker to execute arbitrary code via a crafted script to the /h/autoSaveDraft function.
Product
Zimbra Collaboration Suite (ZCS)
On CISA’s list since
Feb 25, 2025 (federal fix deadline Mar 18, 2025)
What to do
Attackers are using this now. Install Synacor’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog wiki.zimbra.com wiki.zimbra.com
Jun 15, 2023In Zimbra Collaboration Suite through 9.0 and 8.8.15, an attacker (who has initial user access to a Zimbra server instance) can execute commands as root by passCVE-2023-24032 · Email & office · Zimbra · reported by MITREHigh 7.8
In Zimbra Collaboration Suite through 9.0 and 8.8.15, an attacker (who has initial user access to a Zimbra server instance) can execute commands as root by passing one of JVM arguments, leading to local privilege escalation (LPE).
Product
Collaboration
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record wiki.zimbra.com wiki.zimbra.com
Jun 15, 2023An open redirect vulnerability exists in the /preauth Servlet in Zimbra Collaboration Suite through 9.0 and 8.8.15.CVE-2023-24030 · Email & office · Zimbra · reported by MITREMedium 6.1
An open redirect vulnerability exists in the /preauth Servlet in Zimbra Collaboration Suite through 9.0 and 8.8.15. To exploit the vulnerability, an attacker would need to have obtained a valid zimbra auth token or a valid preauth token. Once the token is obtained, an attacker could redirect a user to any URL if url sanitisation is bypassed in incoming requests. NOTE: this is similar, but not identical, to CVE-2021-34807.
Product
Collaboration
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record wiki.zimbra.com wiki.zimbra.com
Oct 17, 2022Due to an issue with incorrect sudo permissions, Zimbra Collaboration Suite (ZCS) suffers from a local privilege escalation issue in versions 9.0.0 and prior, wCVE-2022-3569 · Email & office · Synacor · reported by cve@rapid7.comHigh 7.8
Due to an issue with incorrect sudo permissions, Zimbra Collaboration Suite (ZCS) suffers from a local privilege escalation issue in versions 9.0.0 and prior, where the 'zimbra' user can effectively coerce postfix into running arbitrary commands as 'root'.
Product
Zimbra Collaboration Suite (ZCS)
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record packetstormsecurity.com github.com
Oct 12, 2022In Zimbra Collaboration Suite (ZCS) 8.8.15, at the URL /h/calendar, one can trigger XSS by adding JavaScript code to the view parameter and changing the value oCVE-2022-41351 · Email & office · Zimbra · reported by MITREMedium 6.1
In Zimbra Collaboration Suite (ZCS) 8.8.15, at the URL /h/calendar, one can trigger XSS by adding JavaScript code to the view parameter and changing the value of the uncheck parameter to a string (instead of default value of 10).
Product
Collaboration
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record wiki.zimbra.com wiki.zimbra.com
Oct 12, 2022In Zimbra Collaboration Suite (ZCS) 8.8.15, /h/search?action=voicemail&action=listen accepts a phone parameter that is vulnerable to Reflected XSS.CVE-2022-41350 · Email & office · Zimbra · reported by MITREMedium 6.1
In Zimbra Collaboration Suite (ZCS) 8.8.15, /h/search?action=voicemail&action=listen accepts a phone parameter that is vulnerable to Reflected XSS. This allows executing arbitrary JavaScript on the victim's machine.
Product
Collaboration
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record wiki.zimbra.com wiki.zimbra.com
Oct 12, 2022In Zimbra Collaboration Suite (ZCS) 8.8.15, the URL at /h/compose accepts an attachUrl parameter that is vulnerable to Reflected XSS.CVE-2022-41349 · Email & office · Zimbra · reported by MITREMedium 6.1
In Zimbra Collaboration Suite (ZCS) 8.8.15, the URL at /h/compose accepts an attachUrl parameter that is vulnerable to Reflected XSS. This allows executing arbitrary JavaScript on the victim's machine.
Product
Collaboration
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record wiki.zimbra.com wiki.zimbra.com
Sep 25, 2022Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload VulnerabilityCVE-2022-41352 · Email & office · Synacor · reported by MITREExploitedRansomwareCritical 9.8
Synacor Zimbra Collaboration Suite (ZCS) allows an attacker to upload arbitrary files using cpio package to gain incorrect access to any other user accounts.
Product
Zimbra Collaboration Suite (ZCS)
On CISA’s list since
Oct 20, 2022 (federal fix deadline Nov 10, 2022)
What to do
Attackers are using this now. Install Synacor’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog packetstormsecurity.com forums.zimbra.org
Aug 12, 2022In Zimbra Collaboration Suite (ZCS) 8.8.15, the URL at /h/search?action accepts parameters called extra, title, and onload that are partially sanitised and leadCVE-2022-37044 · Email & office · Zimbra · reported by MITREMedium 6.1
In Zimbra Collaboration Suite (ZCS) 8.8.15, the URL at /h/search?action accepts parameters called extra, title, and onload that are partially sanitised and lead to reflected XSS that allows executing arbitrary JavaScript on the victim's machine.
Product
Collaboration
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record wiki.zimbra.com wiki.zimbra.com
Aug 12, 2022An issue was discovered in the webmail component in Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0.CVE-2022-37043 · Email & office · Zimbra · reported by MITREMedium 5.7
An issue was discovered in the webmail component in Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0. When using preauth, CSRF tokens are not checked on some POST endpoints. Thus, when an authenticated user views an attacker-controlled page, a request will be sent to the application that appears to be intended. The CSRF token is omitted from the request, but the request still succeeds.
Product
Collaboration
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record wiki.zimbra.com wiki.zimbra.com
Aug 12, 2022Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass VulnerabilityCVE-2022-37042 · Email & office · Synacor · reported by MITREExploitedRansomwareCritical 9.8
Synacor Zimbra Collaboration Suite (ZCS) contains an authentication bypass vulnerability in MailboxImportServlet. This vulnerability was chained with CVE-2022-27925 which allows for unauthenticated remote code execution.
Product
Zimbra Collaboration Suite (ZCS)
On CISA’s list since
Aug 11, 2022 (federal fix deadline Sep 1, 2022)
What to do
Attackers are using this now. Install Synacor’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog packetstormsecurity.com wiki.zimbra.com
Aug 12, 2022An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0.CVE-2022-37041 · Email & office · Zimbra · reported by MITREHigh 7.5
An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0. The value of the X-Forwarded-Host header overwrites the value of the Host header in proxied requests. The value of X-Forwarded-Host header is not checked against the whitelist of hosts that ZCS is allowed to proxy to (the zimbraProxyAllowedDomains setting).
Product
Collaboration
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record wiki.zimbra.com wiki.zimbra.com
Apr 20, 2022Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) VulnerabilityCVE-2022-27926 · Email & office · Synacor · reported by MITREExploitedMedium 6.1
Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability by allowing an endpoint URL to accept parameters without sanitizing.
Product
Zimbra Collaboration Suite (ZCS)
On CISA’s list since
Apr 3, 2023 (federal fix deadline Apr 24, 2023)
What to do
Attackers are using this now. Install Synacor’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog wiki.zimbra.com wiki.zimbra.com
Apr 20, 2022Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload VulnerabilityCVE-2022-27925 · Email & office · Synacor · reported by MITREExploitedRansomwareHigh 7.2
Synacor Zimbra Collaboration Suite (ZCS) contains flaw in the mboximport functionality, allowing an authenticated attacker to upload arbitrary files to perform remote code execution. This vulnerability was chained with CVE-2022-37042 which allows for unauthenticated remote code execution.
Product
Zimbra Collaboration Suite (ZCS)
On CISA’s list since
Aug 11, 2022 (federal fix deadline Sep 1, 2022)
What to do
Attackers are using this now. Install Synacor’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog packetstormsecurity.com wiki.zimbra.com
Apr 20, 2022Synacor Zimbra Collaboration Suite (ZCS) Command Injection VulnerabilityCVE-2022-27924 · Email & office · Synacor · reported by MITREExploitedRansomwareHigh 7.5
Synacor Zimbra Collaboration Suite (ZCS) allows an attacker to inject memcache commands into a targeted instance which causes an overwrite of arbitrary cached entries.
Product
Zimbra Collaboration Suite (ZCS)
On CISA’s list since
Aug 4, 2022 (federal fix deadline Aug 25, 2022)
What to do
Attackers are using this now. Install Synacor’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog wiki.zimbra.com wiki.zimbra.com
Dec 15, 2021An issue in /domain/service/.ewell-known/caldav of Zimbra Collaboration 8.8.12 allows attackers to redirect users to any arbitrary website of their choosing.CVE-2020-18985 · Email & office · Synacor · reported by MITREMedium 6.1
An issue in /domain/service/.ewell-known/caldav of Zimbra Collaboration 8.8.12 allows attackers to redirect users to any arbitrary website of their choosing.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record github.com github.com
Dec 15, 2021A reflected cross-site scripting (XSS) vulnerability in the zimbraAdmin/public/secureRequest.jsp component of Zimbra Collaboration 8.8.12 allows unauthenticatedCVE-2020-18984 · Email & office · Synacor · reported by MITREMedium 6.1
A reflected cross-site scripting (XSS) vulnerability in the zimbraAdmin/public/secureRequest.jsp component of Zimbra Collaboration 8.8.12 allows unauthenticated attackers to execute arbitrary web scripts or HTML via a host header injection.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record github.com github.com
Jul 2, 2021An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.x before 9.0.0 Patch 16.CVE-2021-35209 · Email & office · Zimbra · reported by MITRECritical 9.8
An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.x before 9.0.0 Patch 16. The value of the X-Host header overwrites the value of the Host header in proxied requests. The value of X-Host header is not checked against the whitelist of hosts Zimbra is allowed to proxy to (the zimbraProxyAllowedDomains setting).
Product
Collaboration
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record blog.sonarsource.com wiki.zimbra.com
Jul 2, 2021An issue was discovered in ZmMailMsgView.js in the Calendar Invite component in Zimbra Collaboration Suite 8.8.x before 8.8.15 Patch 23.CVE-2021-35208 · Email & office · Zimbra · reported by MITREMedium 5.4
An issue was discovered in ZmMailMsgView.js in the Calendar Invite component in Zimbra Collaboration Suite 8.8.x before 8.8.15 Patch 23. An attacker could place HTML containing executable JavaScript inside element attributes. This markup becomes unescaped, causing arbitrary markup to be injected into the document.
Product
Collaboration
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record blog.sonarsource.com wiki.zimbra.com
Jul 2, 2021An issue was discovered in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.0 before 9.0.0 Patch 16.CVE-2021-35207 · Email & office · Zimbra · reported by MITREMedium 6.1
An issue was discovered in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.0 before 9.0.0 Patch 16. An XSS vulnerability exists in the login component of Zimbra Web Client, in which an attacker can execute arbitrary JavaScript by adding executable JavaScript to the loginErrorCode parameter of the login url.
Product
Collaboration
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record wiki.zimbra.com wiki.zimbra.com
Jul 2, 2021An open redirect vulnerability exists in the /preauth Servlet in Zimbra Collaboration Suite through 9.0.CVE-2021-34807 · Email & office · Zimbra · reported by MITREMedium 6.1
An open redirect vulnerability exists in the /preauth Servlet in Zimbra Collaboration Suite through 9.0. To exploit the vulnerability, an attacker would need to have obtained a valid zimbra auth token or a valid preauth token. Once the token is obtained, an attacker could redirect a user to any URL via isredirect=1&redirectURL= in conjunction with the token data (e.g., a valid authtoken= value).
Product
Collaboration
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record wiki.zimbra.com wiki.zimbra.com
Dec 16, 2020In Zimbra Collaboration Suite Network Edition versions < 9.0.0 P10 and 8.8.15 P17, there exists an XXE vulnerability in the saml consumer store extension, whichCVE-2020-35123 · Email & office · Zimbra · reported by MITREMedium 6.5
In Zimbra Collaboration Suite Network Edition versions < 9.0.0 P10 and 8.8.15 P17, there exists an XXE vulnerability in the saml consumer store extension, which is vulnerable to XXE attacks. This has been fixed in Zimbra Collaboration Suite Network edition 9.0.0 Patch 10 and 8.8.15 Patch 17.
Product
Collaboration
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record wiki.zimbra.com wiki.zimbra.com
Jul 2, 2020An XSS vulnerability exists in the Webmail component of Zimbra Collaboration Suite before 8.8.15 Patch 11.CVE-2020-13653 · Email & office · Synacor · reported by MITREMedium 6.1
An XSS vulnerability exists in the Webmail component of Zimbra Collaboration Suite before 8.8.15 Patch 11. It allows an attacker to inject executable JavaScript into the account name of a user's profile. The injected code can be reflected and executed when changing an e-mail signature.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record wiki.zimbra.com wiki.zimbra.com
Jun 3, 2020Zimbra before 8.8.15 Patch 10 and 9.x before 9.0.0 Patch 3 allows remote code execution via an avatar file.CVE-2020-12846 · Email & office · Synacor · reported by MITREHigh 8
Zimbra before 8.8.15 Patch 10 and 9.x before 9.0.0 Patch 3 allows remote code execution via an avatar file. There is potential abuse of /service/upload servlet in the webmail subsystem. A user can upload executable files (exe,sh,bat,jar) in the Contact section of the mailbox as an avatar image for a contact. A user will receive a "Corrupt File" error, but the file is still uploaded and stored locally in /opt/zimbra/data/tmp/upload/, leaving it open to possible remote execution.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record wiki.zimbra.com wiki.zimbra.com
Feb 18, 2020An issue was discovered in Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7.CVE-2020-8633 · Email & office · Synacor · reported by MITREMedium 5.3
An issue was discovered in Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7. When grantors revoked a shared calendar in Outlook, the calendar stayed mounted and accessible.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record wiki.zimbra.com wiki.zimbra.com
Feb 18, 2020Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery VulnerabilityCVE-2020-7796 · Email & office · Synacor · reported by MITREExploitedCritical 9.8
Synacor Zimbra Collaboration Suite (ZCS) contains a server-side request forgery vulnerability if WebEx zimlet installed and zimlet JSP is enabled.
Product
Zimbra Collaboration Suite
On CISA’s list since
Feb 17, 2026 (federal fix deadline Mar 10, 2026)
What to do
Attackers are using this now. Install Synacor’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog wiki.zimbra.com wiki.zimbra.com
May 30, 2019Synacor Zimbra Mail Client 8.6 before 8.6.0 Patch 5 has XSS via the error/warning dialog and email body content in Zimbra.CVE-2015-7609 · Email & office · Synacor · reported by MITREMedium 6.1
Synacor Zimbra Mail Client 8.6 before 8.6.0 Patch 5 has XSS via the error/warning dialog and email body content in Zimbra.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.zimbra.com bugzilla.zimbra.com
May 30, 2019There is a Persistent XSS vulnerability in the briefcase component of Synacor Zimbra Collaboration Suite (ZCS) Zimbra Web Client (ZWC) 8.8.8 before 8.8.8 Patch CVE-2018-14425 · Email & office · Synacor · reported by MITREMedium 6.1
There is a Persistent XSS vulnerability in the briefcase component of Synacor Zimbra Collaboration Suite (ZCS) Zimbra Web Client (ZWC) 8.8.8 before 8.8.8 Patch 7 and 8.8.9 before 8.8.9 Patch 1.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.zimbra.com wiki.zimbra.com
May 30, 2019Synacor Zimbra Admin UI in Zimbra Collaboration Suite before 8.8.0 beta 2 has Persistent XSS via mail addrs.CVE-2018-10948 · Email & office · Synacor · reported by MITREMedium 4.8
Synacor Zimbra Admin UI in Zimbra Collaboration Suite before 8.8.0 beta 2 has Persistent XSS via mail addrs.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.zimbra.com bugzilla.zimbra.com
May 30, 2019An issue was discovered in Synacor Zimbra Collaboration Suite 8.6.x before 8.6.0 Patch 11, 8.7.x before 8.7.11 Patch 6, 8.8.x before 8.8.8 Patch 9, and 8.8.9 beCVE-2018-15131 · Email & office · Synacor · reported by MITREMedium 5.3
An issue was discovered in Synacor Zimbra Collaboration Suite 8.6.x before 8.6.0 Patch 11, 8.7.x before 8.7.11 Patch 6, 8.8.x before 8.8.8 Patch 9, and 8.8.9 before 8.8.9 Patch 3. Account number enumeration is possible via inconsistent responses for specific types of authentication requests.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.zimbra.com wiki.zimbra.com
May 29, 2019Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity ReferenceCVE-2019-9670 · Email & office · Synacor · reported by MITREExploitedCritical 9.8
Synacor Zimbra Collaboration Suite (ZCS) contains an improper restriction of XML external entity (XXE) vulnerability in the mailboxd component.
Product
Zimbra Collaboration Suite (ZCS)
On CISA’s list since
Jan 10, 2022 (federal fix deadline Jul 10, 2022)
What to do
Attackers are using this now. Install Synacor’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog packetstormsecurity.com rapid7.com
May 29, 2019Zimbra Collaboration Suite 8.7.x through 8.8.11 allows Blind SSRF in the Feed component.CVE-2019-6981 · Email & office · Synacor · reported by MITREMedium 6.5
Zimbra Collaboration Suite 8.7.x through 8.8.11 allows Blind SSRF in the Feed component.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.zimbra.com wiki.zimbra.com
May 29, 2019Synacor Zimbra Collaboration Suite 8.7.x through 8.8.11 allows insecure object deserialization in the IMAP component.CVE-2019-6980 · Email & office · Synacor · reported by MITRECritical 9.8
Synacor Zimbra Collaboration Suite 8.7.x through 8.8.11 allows insecure object deserialization in the IMAP component.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.zimbra.com wiki.zimbra.com
May 29, 2019ZxChat (aka ZeXtras Chat), as used for zimbra-chat and zimbra-talk in Synacor Zimbra Collaboration Suite 8.7 and 8.8 and in other products, allows XXE attacks, CVE-2018-20160 · Email & office · Synacor · reported by MITRECritical 9.8
ZxChat (aka ZeXtras Chat), as used for zimbra-chat and zimbra-talk in Synacor Zimbra Collaboration Suite 8.7 and 8.8 and in other products, allows XXE attacks, as demonstrated by a crafted XML request to mailboxd.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.zimbra.com wiki.zimbra.com
May 29, 2019mailboxd component in Synacor Zimbra Collaboration Suite 8.6, 8.7 before 8.7.11 Patch 7, and 8.8 before 8.8.10 Patch 2 has Persistent XSS.CVE-2018-18631 · Email & office · Synacor · reported by MITREMedium 6.1
mailboxd component in Synacor Zimbra Collaboration Suite 8.6, 8.7 before 8.7.11 Patch 7, and 8.8 before 8.8.10 Patch 2 has Persistent XSS.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.zimbra.com wiki.zimbra.com
May 29, 2019Synacor Zimbra Collaboration Suite Collaboration before 8.8.11 has XSS in the AJAX and html web clients.CVE-2018-14013 · Email & office · Synacor · reported by MITREMedium 6.1
Synacor Zimbra Collaboration Suite Collaboration before 8.8.11 has XSS in the AJAX and html web clients.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record packetstormsecurity.com seclists.org
Apr 30, 2019Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery (SSRF) VulnerabilityCVE-2019-9621 · Email & office · Synacor · reported by MITREExploitedHigh 7.5
Synacor Zimbra Collaboration Suite (ZCS) contains a server-side request forgery (SSRF) vulnerability via the ProxyServlet component.
Product
Zimbra Collaboration Suite (ZCS)
On CISA’s list since
Jul 7, 2025 (federal fix deadline Jul 28, 2025)
What to do
Attackers are using this now. Install Synacor’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog packetstormsecurity.com packetstormsecurity.com
Oct 3, 2018Zimbra Collaboration before 8.8.10 GA allows text content spoofing via a loginErrorCode value.CVE-2018-17938 · Email & office · Synacor · reported by MITREMedium 5.3
Zimbra Collaboration before 8.8.10 GA allows text content spoofing via a loginErrorCode value.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.zimbra.com wiki.zimbra.com
May 30, 2018Zimbra Web Client (ZWC) in Zimbra Collaboration Suite 8.8 before 8.8.8.Patch4 and 8.7 before 8.7.11.Patch4 has Persistent XSS via a contact group.CVE-2018-10939 · Email & office · Synacor · reported by MITREMedium 6.1
Zimbra Web Client (ZWC) in Zimbra Collaboration Suite 8.8 before 8.8.8.Patch4 and 8.7 before 8.7.11.Patch4 has Persistent XSS via a contact group.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record blog.zimbra.com wiki.zimbra.com
May 30, 2018Cross-site request forgery (CSRF) vulnerability in the login form in Zimbra Collaboration Suite (aka ZCS) before 8.6.0 Patch 10, 8.7.x before 8.7.11 Patch 2, anCVE-2015-7610 · Email & office · Synacor · reported by MITREHigh 8.8
Cross-site request forgery (CSRF) vulnerability in the login form in Zimbra Collaboration Suite (aka ZCS) before 8.6.0 Patch 10, 8.7.x before 8.7.11 Patch 2, and 8.8.x before 8.8.8 Patch 1 allows remote attackers to hijack the authentication of unspecified victims by leveraging failure to use a CSRF token.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record blog.zimbra.com blog.zimbra.com
May 9, 2018mailboxd in Zimbra Collaboration Suite 8.8 before 8.8.8; 8.7 before 8.7.11.Patch3; and 8.6 before 8.6.0.Patch10 allows zimbraSSLPrivateKey read access via a GetCVE-2018-10951 · Email & office · Synacor · reported by MITREMedium 6.5
mailboxd in Zimbra Collaboration Suite 8.8 before 8.8.8; 8.7 before 8.7.11.Patch3; and 8.6 before 8.6.0.Patch10 allows zimbraSSLPrivateKey read access via a GetServer, GetAllServers, or GetAllActiveServers call in the Admin SOAP API.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.zimbra.com bugzilla.zimbra.com
May 9, 2018mailboxd in Zimbra Collaboration Suite 8.8 before 8.8.8; 8.7 before 8.7.11.Patch3; and 8.6 before 8.6.0.Patch10 allows Information Exposure through Verbose ErroCVE-2018-10950 · Email & office · Synacor · reported by MITREMedium 5.3
mailboxd in Zimbra Collaboration Suite 8.8 before 8.8.8; 8.7 before 8.7.11.Patch3; and 8.6 before 8.6.0.Patch10 allows Information Exposure through Verbose Error Messages containing a stack dump, tracing data, or full user-context dump.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.zimbra.com bugzilla.zimbra.com
May 9, 2018mailboxd in Zimbra Collaboration Suite 8.8 before 8.8.8; 8.7 before 8.7.11.Patch3; and 8.6 allows Account Enumeration by leveraging a Discrepancy between the "HCVE-2018-10949 · Email & office · Synacor · reported by MITREMedium 5.3
mailboxd in Zimbra Collaboration Suite 8.8 before 8.8.8; 8.7 before 8.7.11.Patch3; and 8.6 allows Account Enumeration by leveraging a Discrepancy between the "HTTP 404 - account is not active" and "HTTP 401 - must authenticate" errors.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.zimbra.com bugzilla.zimbra.com
Mar 27, 2018Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) VulnerabilityCVE-2018-6882 · Email & office · Synacor · reported by MITREExploitedRansomwareMedium 6.1
Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability that might allow remote attackers to inject arbitrary web script or HTML.
Product
Zimbra Collaboration Suite (ZCS)
On CISA’s list since
Apr 19, 2022 (federal fix deadline May 10, 2022)
What to do
Attackers are using this now. Install Synacor’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog seclists.org securityfocus.com
Feb 3, 2018Synacor Zimbra Collaboration Suite (ZCS) before 8.7.10 has Persistent XSS.CVE-2017-8783 · Email & office · Synacor · reported by MITREMedium 5.4
Synacor Zimbra Collaboration Suite (ZCS) before 8.7.10 has Persistent XSS.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.zimbra.com bugzilla.zimbra.com
Feb 3, 2018Synacor Zimbra Collaboration Suite (ZCS) before 8.8.3 has Persistent XSS.CVE-2017-17703 · Email & office · Synacor · reported by MITREMedium 6.1
Synacor Zimbra Collaboration Suite (ZCS) before 8.8.3 has Persistent XSS.
Product
Zimbra Collaboration Suite
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record bugzilla.zimbra.com wiki.zimbra.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.

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