PT-2026-54938 · Joe Dolson · My Calendar – Accessible Event Manager

Athiwat Tiprasaharn + 1 · Published 2026-07-02 · Updated 2026-07-02 · CVE-2026-11896

Mitre

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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.

Fix

IDOR

Weakness Enumeration

CWE-639

Related Identifiers

CVE-2026-11896

Affected Products

My Calendar – Accessible Event Manager

References · 15

• https://nvd.nist.gov/vuln/detail/CVE-2026-11896 · Security Note
• https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-events.php#L748 · Note
• https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-events.php#L748 · Note
• https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-api.php#L246 · Note
• https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar.php#L209 · Note
• https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar.php#L209 · Note
• https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-api.php#L212 · Note
• https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-api.php#L246 · Note
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3572191%40my-calendar&new=3572191%40my-calendar&sfp_email=&sfph_mail= · Note
• https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-api.php#L212 · Note
• https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/includes/ical.php#L26 · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/a72639df-fa05-414c-b30c-eb285f59d945?source=cve · Note
• https://plugins.trac.wordpress.org/browser/my-calendar/trunk/includes/ical.php#L26 · Note
• https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/includes/date-utilities.php#L417 · Note
• https://plugins.trac.wordpress.org/browser/my-calendar/trunk/includes/date-utilities.php#L417 · Note