SimpleCalendar Google Calendar Events CVE-2025-68979
MEDIUMSeverity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Remotely exploitable without privileges; only low confidentiality impact and no scope change.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
1DescriptionCVE.org
Authorization Bypass Through User-Controlled Key vulnerability in SimpleCalendar Google Calendar Events google-calendar-events allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Google Calendar Events: from n/a through <= 3.5.9.
AnalysisAI
Information disclosure in SimpleCalendar Google Calendar Events plugin through 3.5.9 allows unauthenticated attackers to read unauthorized calendar event data by exploiting a user-controlled key parameter. The vulnerability arises from a failure to properly verify object ownership, enabling simple direct reference manipulation. No active exploitation or public exploit code has been reported at this time, and EPSS likelihood remains very low (0.04%).
Technical ContextAI
The vulnerability is an Insecure Direct Object Reference (IDOR) classified under CWE-639. The WordPress plugin 'google-calendar-events' (SimpleCalendar) fails to validate that the requesting user has permission to access the calendar event referenced by a user-supplied identifier. By modifying a parameter value, an attacker can access event data belonging to other users or sites without appropriate authorization. This class of flaw is common in web applications where access control checks are omitted for API endpoints that rely on client-provided keys to retrieve resources.
Affected ProductsAI
The SimpleCalendar Google Calendar Events plugin for WordPress (repository slug: google-calendar-events) is affected in all versions from n/a through 3.5.9. A vendor advisory is available at Patchstack (https://patchstack.com/database/Wordpress/Plugin/google-calendar-events/vulnerability/wordpress-google-calendar-events-plugin-3-5-9-insecure-direct-object-references-idor-vulnerability?_s_id=cve).
RemediationAI
Update the plugin to a version higher than 3.5.9 when released by the vendor; refer to the Patchstack advisory for the exact patched version. If an immediate update is not feasible, disable the plugin temporarily, understanding that this will remove all Google Calendar functionality from the site. No specific configuration-based workaround is available because the missing access control is in the code flow, not a toggleable setting.
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External POC / Exploit Code
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