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.
21 results
Sep 23, 2026Booking Manager: Does not sanitize and escape values taken from a fetched external iCalendar feed before using them in a SQL queryCVE-2026-91024 · WordPress plugins & themes · reported by WPScanMedium 6.8
The Booking Manager WordPress plugin before 2.1.21 does not sanitize and escape values taken from a fetched external iCalendar feed before using them in a SQL query, allowing authenticated users with Author-level access and above to perform SQL injection attacks by importing a feed they control.
- Product
- Booking Manager
- Fixed in
- 2.1.21
- What to do
- Update Booking Manager to 2.1.21 or newer.
Sep 22, 2026icalendar is an RFC 5545 compatible parser and generator of iCalendar files for Python.CVE-2026-77399 · Other software · collective · reported by GitHubMedium 6.5
icalendar is an RFC 5545 compatible parser and generator of iCalendar files for Python. From 6.1.0 until 7.2.2, vInt.from_ical accepts an attacker-controlled VALARM REPEAT value and applications that request alarm times can eagerly expand it without an application-level limit. Alarms.times and Alarms.active reach the unbounded expansion in versions starting with 6.1.0, while Alarm.triggers adds a second affected path starting with 7.0.0. Parsing alone does not trigger the issue, but accessing these properties can consume excessive CPU time and heap memory and terminate or stall a service. This issue is fixed in version 7.2.2.
- Product
- icalendar
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 25, 2026icalendar is an RFC 5545 compatible parser and generator of iCalendar files for Python.CVE-2026-55099 · Other software · collective · reported by GitHubHigh 7.5
icalendar is an RFC 5545 compatible parser and generator of iCalendar files for Python. From 7.1.0 until 7.1.3, the Component equality method in src/icalendar/cal/component.py compares nested subcomponents with two membership loops, and each membership test invokes the same method on child components, causing O(2^n) work relative to nesting depth. Component.from_ical accepts arbitrarily nested BEGIN:VEVENT blocks without a depth limit, so an attacker can submit a sub-kilobyte .ics file containing equal nested subtrees and trigger the cost when an application performs equality, inequality, membership, deduplication, test-assertion, round-trip, or normalization comparisons. Parsing alone does not trigger the issue, and comparisons that differ early short-circuit, but a few hundred bytes can pin a CPU core for minutes or indefinitely, causing denial of service in calendar sync or import endpoints, invite processing, and other comparison paths. This issue is fixed in version 7.1.3.
- Product
- icalendar
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Mar 26, 2026iCalendar is a Ruby library for dealing with iCalendar files in the iCalendar format defined by RFC-5545.CVE-2026-33635 · Other software · icalendar · reported by GitHubMedium 4.3
iCalendar is a Ruby library for dealing with iCalendar files in the iCalendar format defined by RFC-5545. Starting in version 2.0.0 and prior to version 2.12.2, .ics serialization does not properly sanitize URI property values, enabling ICS injection through attacker-controlled input, adding arbitrary calendar lines to the output. `Icalendar::Values::Uri` falls back to the raw input string when `URI.parse` fails and later serializes it with `value.to_s` without removing or escaping `\r` or `\n` characters. That value is embedded directly into the final ICS line by the normal serializer, so a payload containing CRLF can terminate the original property and create a new ICS property or component. (It looks like you can inject via url, source, image, organizer, attach, attendee, conference, tzurl because of this). Applications that generate `.ics` files from partially untrusted metadata are impacted. As a result, downstream calendar clients or importers may process attacker-supplied content as if it were legitimate event data, such as added attendees, modified URLs, alarms, or other calendar fields. Version 2.12.2 contains a patch for the issue.
- Product
- icalendar
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Mar 19, 2014Multiple cross-site scripting (XSS) vulnerabilities in tmpl/layout_editevent.php in the Multi Calendar (com_multicalendar) component 4.0.2, and possibly 4.8.5 aCVE-2013-5953 · Other software · Codepeople · reported by MITREMedium 4.3
Multiple cross-site scripting (XSS) vulnerabilities in tmpl/layout_editevent.php in the Multi Calendar (com_multicalendar) component 4.0.2, and possibly 4.8.5 and earlier, for Joomla! allow remote attackers to inject arbitrary web script or HTML via the (1) calid or (2) paletteDefault parameter in an editevent action to index.php.
- Product
- COM Multicalendar
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordarchives.neohapsis.compacketstormsecurity.com
Sep 19, 2012The iCalendar component in gwwww1.dll in GroupWise Internet Agent (GWIA) in Novell GroupWise 8.0 before Support Pack 3 allows remote attackers to cause a denialCVE-2011-3827 · Other software · Novell · reported by PSIRT-CNA@flexerasoftware.comMedium 4.3
The iCalendar component in gwwww1.dll in GroupWise Internet Agent (GWIA) in Novell GroupWise 8.0 before Support Pack 3 allows remote attackers to cause a denial of service (out-of-bounds read and daemon crash) via a crafted date-time string in a .ics attachment.
- Product
- Groupwise
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordarchives.neohapsis.comsecunia.com
Sep 23, 2011PHP iCalendar 2.4 allows remote attackers to obtain sensitive information via a direct request to a .php file, which reveals the installation path in an error mCVE-2011-3780 · Websites & servers · Phpicalendar · reported by MITREMedium 5
PHP iCalendar 2.4 allows remote attackers to obtain sensitive information via a direct request to a .php file, which reveals the installation path in an error message, as demonstrated by rss/rss_common.php and certain other files.
- Product
- PHP Icalendar
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordcode.google.comcode.google.com
Jun 2, 2010SQL injection vulnerability in the Calendar Base (cal) extension before 1.3.2 for TYPO3 allows remote attackers to execute arbitrary SQL commands via iCalendar CVE-2010-2131 · Other software · Mario Matzulla · reported by MITREHigh 7.5
SQL injection vulnerability in the Calendar Base (cal) extension before 1.3.2 for TYPO3 allows remote attackers to execute arbitrary SQL commands via iCalendar data.
- Product
- CAL
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jan 26, 2009Directory traversal vulnerability in print.php in PHP iCalendar 2.24 and earlier allows remote attackers to include and execute arbitrary local files via a ..CVE-2008-5968 · Websites & servers · Phpicalendar · reported by MITREHigh 7.5
Directory traversal vulnerability in print.php in PHP iCalendar 2.24 and earlier allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the cookie_language parameter in a phpicalendar_* cookie, a different vector than CVE-2006-1292.
- Product
- Phpicalendar
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordexchange.xforce.ibmcloud.comexploit-db.com
Jan 26, 2009admin/index.php in PHP iCalendar 2.3.4, 2.24, and earlier does not require administrative authentication for an addupdate action, which allows remote attackers CVE-2008-5967 · Websites & servers · Phpicalendar · reported by MITREHigh 7.5
admin/index.php in PHP iCalendar 2.3.4, 2.24, and earlier does not require administrative authentication for an addupdate action, which allows remote attackers to upload a calendar (aka .ics) file with arbitrary content to the calendars/ directory outside the web root.
- Product
- Phpicalendar
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsecunia.comexchange.xforce.ibmcloud.com
Jan 5, 2009PHP iCalendar 2.24 and earlier allows remote attackers to bypass authentication by setting the phpicalendar and phpicalendar_login cookies to 1.CVE-2008-5840 · Websites & servers · Phpicalendar · reported by MITREHigh 7.5
PHP iCalendar 2.24 and earlier allows remote attackers to bypass authentication by setting the phpicalendar and phpicalendar_login cookies to 1.
- Product
- Phpicalendar
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsecurityreason.comsecurityfocus.com
Aug 10, 2008PHP remote file inclusion vulnerability in modules/calendar/minicalendar.php in ezContents CMS allows remote attackers to execute arbitrary PHP code via a URL iCVE-2008-3575 · Other software · Ezcontents · reported by MITREHigh 7.5
PHP remote file inclusion vulnerability in modules/calendar/minicalendar.php in ezContents CMS allows remote attackers to execute arbitrary PHP code via a URL in the GLOBALS[gsLanguage] parameter, a different vector than CVE-2006-4477 and CVE-2004-0132.
- Product
- Ezcontents CMS
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsecurityreason.comsecurityfocus.com
Jun 4, 2008Heap-based buffer overflow in Evolution 2.22.1 allows user-assisted remote attackers to execute arbitrary code via a long DESCRIPTION property in an iCalendar aCVE-2008-1109 · Other software · Gnome · reported by PSIRT-CNA@flexerasoftware.comHigh 9.3
Heap-based buffer overflow in Evolution 2.22.1 allows user-assisted remote attackers to execute arbitrary code via a long DESCRIPTION property in an iCalendar attachment, which is not properly handled during a reply in the calendar view (aka the Calendars window).
- Product
- Evolution
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordlists.opensuse.orgsecunia.com
Dec 29, 2006Multiple cross-site scripting (XSS) vulnerabilities in Jim Hu and Chad Little PHP iCalendar 2.23 rc1 and earlier allow remote attackers to inject arbitrary web CVE-2006-6824 · Websites & servers · PHP Icalendar · reported by MITREMedium 4.3
Multiple cross-site scripting (XSS) vulnerabilities in Jim Hu and Chad Little PHP iCalendar 2.23 rc1 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) getdate parameter in (a) day.php, (b) month.php, (c) year.php, (d) week.php, (e) search.php, (f) rss/index.php, (g) print.php, and (h) preferences.php; the (2) cpath parameter in (i) day.php, (j) month.php, (k) year.php, (l) week.php, and (m) search.php; the (3) query parameter in search.php; and possibly the cpath, (4) unset, and (5) set parameters in a setcookie action in preferences.php; different vectors than CVE-2006-3319. NOTE: it was later reported that vectors b, c, and d also affect 2.24.
- Product
- PHP Icalendar
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordlostmon.blogspot.comsecunia.com
Nov 20, 2006Multiple SQL injection vulnerabilities in MultiCalendars allow remote attackers to execute arbitrary SQL commands via the (1) M or (2) Y parameter to rss_out.asCVE-2006-5977 · Other software · Expinion.net · reported by MITREHigh 7.5
Multiple SQL injection vulnerabilities in MultiCalendars allow remote attackers to execute arbitrary SQL commands via the (1) M or (2) Y parameter to rss_out.asp, or the (3) cate parameter to all_calendars.asp. NOTE: the all_calendars.asp/calsids vector is already covered by CVE-2006-2293.
- Product
- Multicalendars
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsecurityreason.comsecurityfocus.com
Jun 29, 2006Cross-site scripting (XSS) vulnerability in rss/index.php in PHP iCalendar 2.22 and earlier allows remote attackers to inject arbitrary web script or HTML via tCVE-2006-3319 · Websites & servers · PHP Icalendar · reported by MITREMedium 4.3
Cross-site scripting (XSS) vulnerability in rss/index.php in PHP iCalendar 2.22 and earlier allows remote attackers to inject arbitrary web script or HTML via the cal parameter.
- Product
- PHP Icalendar
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordkurdishsecurity.blogspot.comsecunia.com
May 9, 2006SQL injection vulnerability in all_calendars.asp in MultiCalendars 3.0 allows remote attackers to execute arbitrary SQL commands via the calsids parameter.CVE-2006-2293 · Other software · Expinion.net · reported by MITREMedium 6.4
SQL injection vulnerability in all_calendars.asp in MultiCalendars 3.0 allows remote attackers to execute arbitrary SQL commands via the calsids parameter. NOTE: the provenance of this information is unknown; the details are obtained from third party information.
- Product
- Multicalendars
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recorddownloads.securityfocus.comsecunia.com
Mar 19, 2006publish.ical.php in Jim Hu and Chad Little PHP iCalendar 2.21 and earlier does not require authentication for write access to the calendars directory, which allCVE-2006-1291 · Websites & servers · PHP Icalendar · reported by MITREHigh 7.5
publish.ical.php in Jim Hu and Chad Little PHP iCalendar 2.21 and earlier does not require authentication for write access to the calendars directory, which allows remote attackers to upload and execute arbitrary PHP scripts via a WebDAV PUT request with a filename containing a .php extension and a trailing null character.
- Product
- PHP Icalendar
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recorddownloads.securityfocus.comsecunia.com
Mar 19, 2006Directory traversal vulnerability in Jim Hu and Chad Little PHP iCalendar 2.21 and earlier allows remote attackers to include and execute arbitrary local files CVE-2006-1292 · Websites & servers · PHP Icalendar · reported by MITREMedium 5
Directory traversal vulnerability in Jim Hu and Chad Little PHP iCalendar 2.21 and earlier allows remote attackers to include and execute arbitrary local files via directory traversal sequences and a NUL (%00) character in the phpicalendar[cookie_language] and phpicalendar[cookie_style] cookies, as demonstrated by injecting PHP sequences into an Apache access_log file, which is then included by day.php.
- Product
- PHP Icalendar
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsecunia.comsecurityfocus.com
Feb 13, 2006Multiple directory traversal vulnerabilities in PHP iCalendar 2.0.1, 2.1, and 2.2 allow remote attackers to include arbitrary files via the (1) getdate and possCVE-2006-0648 · Websites & servers · PHP Icalendar · reported by MITREMedium 5
Multiple directory traversal vulnerabilities in PHP iCalendar 2.0.1, 2.1, and 2.2 allow remote attackers to include arbitrary files via the (1) getdate and possibly other parameters used in the replace_files function in search.php and (2) $file variable as used in the parse function in functions/template.php.
- Product
- PHP Icalendar
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordevuln.comphpicalendar.net
Oct 30, 2005PHP file inclusion vulnerability in index.php in PHP iCalendar 2.0a2 through 2.0.1 allows remote attackers to execute arbitrary PHP code and include arbitrary lCVE-2005-3366 · Websites & servers · PHP Icalendar · reported by MITREMedium 6.8
PHP file inclusion vulnerability in index.php in PHP iCalendar 2.0a2 through 2.0.1 allows remote attackers to execute arbitrary PHP code and include arbitrary local files via the phpicalendar cookie. NOTE: this is not a cross-site scripting (XSS) issue as claimed by the original researcher.
- Product
- PHP Icalendar
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordarchives.neohapsis.commarc.info
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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