What’s Vulnerable › Vulnerabilities
CVE-2026-11896: My Calendar <= 3.7.14 - Insecure Direct Object Reference to Unauthenticated Sensitive Information Disclosure via 'vcal' Parameter
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-07-02 · updated 2026-07-02
- Weakness: CWE-639
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.
Affected products
- joedolson My Calendar – Accessible Event Manager: through 3.7.14
References
- https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/includes/date-utilities.php#L417
- https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/includes/ical.php#L26
- https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-api.php#L212
- https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-api.php#L246
- https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-events.php#L748
- https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar.php#L209
- https://plugins.trac.wordpress.org/browser/my-calendar/trunk/includes/date-utilities.php#L417
- https://plugins.trac.wordpress.org/browser/my-calendar/trunk/includes/ical.php#L26
- https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-api.php#L212
- https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-api.php#L246
- https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-events.php#L748
- https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar.php#L209
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