CVE-2026-11896

Vulnerability Description

The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.7.14 via the 'vcal' parameter due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to enumerate occurrence IDs and access the full iCalendar export of non-public, draft, trashed, and personal calendar events, disclosing sensitive event metadata including titles, descriptions, dates, locations, organizer and host details, permalinks, and related calendar metadata.

CVSS Score

Related Weaknesses (CWE)

References

• https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/includes/date
• https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/includes/ical
• https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-a
• https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-a
• https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-e
• https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar.p
• https://plugins.trac.wordpress.org/browser/my-calendar/trunk/includes/date-utili
• https://plugins.trac.wordpress.org/browser/my-calendar/trunk/includes/ical.php#L
• https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-api.php
• https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-api.php
• https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-events.
• https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar.php#L20
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old
• https://www.wordfence.com/threat-intel/vulnerabilities/id/a72639df-fa05-414c-b30