My Calendar <= 3.7.14 - Insecure Direct Object Reference to Unauthenticated Sensitive Information Disclosure via 'vcal' Parameter

Summary

CVE	CVE-2026-11896
State	PUBLISHED
Assigner	Wordfence
Source Priority	CVE Program / NVD first with legacy fallback
Published	2026-07-02 10:16:27 UTC
Updated	2026-07-02 20:17:00 UTC
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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.003130000 probability, percentile 0.231290000 (date 2026-07-03)

Problem Types: CWE-639 | CWE-639 CWE-639 Authorization Bypass Through User-Controlled Key

Version	Source	Type	Score	Severity	Vector
3.1	[email protected]	Secondary	5.3	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`
3.1	CNA	DECLARED	5.3	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`

CVSS v3.1 Breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Joedolson	My Calendar Accessible Event Manager	affected 3.7.14 semver	Not specified

References

Reference	Source	Link	Tags
plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-events.php	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar.php	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar.php	[email protected]	plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/a72639df-fa05-414c-b30c-eb285...	[email protected]	www.wordfence.com
plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-api.php	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/my-calendar/trunk/includes/ical.php	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-events.php	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/includes/date-utilities.php	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-api.php	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-api.php	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/includes/ical.php	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-api.php	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/my-calendar/trunk/includes/date-utilities.php	[email protected]	plugins.trac.wordpress.org
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Athiwat Tiprasaharn (Jitlada) (en)

CNA: Tharadol Suksamran (d3kc4rt_1) (en)

Additional Advisory Data

Source	Time	Event
CNA	2026-06-10T15:55:08.000Z	Vendor Notified
CNA	2026-07-01T20:04:38.000Z	Disclosed

There are currently no legacy QID mappings associated with this CVE.