CVE-2026-11896 json
My Calendar <= 3.7.14 - Insecure Direct Object Reference to Unauthenticated Sensitive Information Disclosure via 'vcal' Parameter
published 2026-07-02 4 mo ago modified 2026-07-02 4 mo ago also EUVD-2026-41266
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 45%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.54% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected products
- joedolson My Calendar – Accessible Event Manager
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/a72639df-fa05-414c-b30c-eb285f59d945?source=cve
- plugins.trac.wordpress.org /browser/my-calendar/tags/3.7.14/my-calendar-api.php#L212
- plugins.trac.wordpress.org /browser/my-calendar/tags/3.7.14/my-calendar.php#L209
- plugins.trac.wordpress.org /browser/my-calendar/tags/3.7.14/my-calendar-api.php#L246
- plugins.trac.wordpress.org /browser/my-calendar/tags/3.7.14/my-calendar-events.php#L748
- plugins.trac.wordpress.org /browser/my-calendar/tags/3.7.14/includes/ical.php#L26
- plugins.trac.wordpress.org /browser/my-calendar/tags/3.7.14/includes/date-utilities.php#L417
- plugins.trac.wordpress.org /browser/my-calendar/trunk/my-calendar-api.php#L212
- plugins.trac.wordpress.org /browser/my-calendar/trunk/my-calendar.php#L209
- plugins.trac.wordpress.org /browser/my-calendar/trunk/my-calendar-api.php#L246
- plugins.trac.wordpress.org /browser/my-calendar/trunk/my-calendar-events.php#L748
- plugins.trac.wordpress.org /browser/my-calendar/trunk/includes/ical.php#L26
- plugins.trac.wordpress.org /browser/my-calendar/trunk/includes/date-utilities.php#L417
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&old=3572191%40my-calendar&new=3572191%40my-calendar&sfp_email=&sfph
Sources
- CVE List CVE-2026-11896
- NVD CVE-2026-11896
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.