EUVD-2026-78202

Concrete CMS 8.3.0 to 9.5.2 stored calendar event names without sanitization and rendered them without HTML escaping in the workflow approval and deletion notifications shown in the dashboard "Waiting For Me" block. A registered user permitted to add events to a calendar governed by an approval...

CVE-2026-15402: Improper Neutralization of Input During Web Page Generation

The Eventin – Event Calendar, Event Registration, Tickets & Booking AI Powered plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'etnsheduleobjective' scheduleslot Parameter in all versions up to, and including, 4.1.23 due to insufficient input sanitization and output escaping...

CVE-2026-18116 Concrete CMS 8.3.0 to 9.5.2 is vulnerable to Stored XSS in Calendar Event Name via Workflow Approval Notifications

Concrete CMS 8.3.0 to 9.5.2 stored calendar event names without sanitization and rendered them without HTML escaping in the workflow approval and deletion notifications shown in the dashboard "Waiting For Me" block. A registered user permitted to add events to a calendar governed by an approval...

CVE-2026-18116 Concrete CMS 8.3.0 to 9.5.2 is vulnerable to Stored XSS in Calendar Event Name via Workflow Approval Notifications

Concrete CMS 8.3.0 to 9.5.2 stored calendar event names without sanitization and rendered them without HTML escaping in the workflow approval and deletion notifications shown in the dashboard "Waiting For Me" block. A registered user permitted to add events to a calendar governed by an approval...

CVE-2026-18116 Concrete CMS 8.3.0 to 9.5.2 is vulnerable to Stored XSS in Calendar Event Name via Workflow Approval Notifications

Concrete CMS 8.3.0 to 9.5.2 stored calendar event names without sanitization and rendered them without HTML escaping in the workflow approval and deletion notifications shown in the dashboard "Waiting For Me" block. A registered user permitted to add events to a calendar governed by an approval...

CVE-2026-18116: Improper Neutralization of Input During Web Page Generation

Concrete CMS 8.3.0 to 9.5.2 stored calendar event names without sanitization and rendered them without HTML escaping in the workflow approval and deletion notifications shown in the dashboard "Waiting For Me" block. A registered user permitted to add events to a calendar governed by an approval...

CVE-2026-68526

Concrete CMS before 9.5.3 did not validate an anti-CSRF token in the Calendar event duplicate dialog controller concrete/controllers/dialog/event/duplicate.php submit action, which duplicated a calendar event after checking only canAccess and the per-resource canAddCalendarEvent permission, so a...

CVE-2026-68526 Concrete CMS before 9.5.3 is vulnerable to CSRF in the Calendar event duplicate dialog controller

Concrete CMS before 9.5.3 did not validate an anti-CSRF token in the Calendar event duplicate dialog controller concrete/controllers/dialog/event/duplicate.php submit action, which duplicated a calendar event after checking only canAccess and the per-resource canAddCalendarEvent permission, so a...

CVE-2026-68526

Concrete CMS before 9.5.3 is affected by a missing anti-CSRF token validation in the Calendar event duplicate dialog controller (concrete/controllers/dialog/event/duplicate.php), specifically in its submit() action. The action only checked canAccess() and the per-resource canAddCalendarEvent() pe...

CVE-2026-68526 Concrete CMS before 9.5.3 is vulnerable to CSRF in the Calendar event duplicate dialog controller

Concrete CMS before 9.5.3 did not validate an anti-CSRF token in the Calendar event duplicate dialog controller concrete/controllers/dialog/event/duplicate.php submit action, which duplicated a calendar event after checking only canAccess and the per-resource canAddCalendarEvent permission, so a...

PT-2026-89540

Concrete CMS versions 8.3.0 through 9.5.2 are vulnerable to an authorization bypass in the Calendar event edit dialog concrete/controllers/dialog/event/edit.php. The dialog checked permissions against the calendar identifier supplied in the request rather than the calendar owning the targeted eve...

CVE-2026-68527: Authorization Bypass Through User-Controlled Key

Concrete CMS versions 8.3.0 through 9.5.2 are vulnerable to an authorization bypass in the Calendar event edit dialog concrete/controllers/dialog/event/edit.php. The dialog checked permissions against the calendar identifier supplied in the request rather than the calendar owning the targeted eve...

CVE-2026-15406: Improper Control of Filename for Include/Require Statement in PHP Program

The Eventin – Event Calendar, Event Registration, Tickets & Booking AI Powered plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 4.1.22 via the 'eventlayout' parameter parameter. This makes it possible for authenticated attackers, with custom-level...

CVE-2026-11821: Missing Authorization

The Eventin – Event Calendar, Event Registration, Tickets & Booking AI Powered plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.1.17. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it...

CVE-2026-15667: Improper Control of Filename for Include/Require Statement in PHP Program

The Eventin – Event Calendar, Event Registration, Tickets & Booking AI Powered plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 4.1.22 via the 'eventlayout' parameter parameter. This makes it possible for authenticated attackers, with...

CVE-2026-15398: Missing Authorization

The Eventin – Event Calendar, Event Registration, Tickets & Booking AI Powered plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.1.22. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it...

CVE-2026-45122

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...

PYSEC-2026-2722 Open WebUI IDOR: Calendar event re-parenting allows writing events into another user's calendar

Summary POST /api/v1/calendars/events/eventid/update validates that the caller has write access to the calendar the event currently belongs to, but does not validate the destination calendarid supplied in the request body. The model layer then persists the new calendarid unconditionally. A regula...

PT-2026-59365

Summary POST /api/v1/calendars/events/event id/update validates that the caller has write access to the calendar the event currently belongs to, but does not validate the destination calendar id supplied in the request body. The model layer then persists the new calendar id unconditionally. A...

CVE-2026-13039: Missing Authorization

The Eventin – Event Calendar, Event Registration, Tickets & Booking AI Powered plugin for WordPress is vulnerable to authorization bypass due to a regression in versions from 4.0.26 up to and including 4.1.15. This is due to the plugin not properly verifying that a user is authorized to perform a...