Critical severity9.8NVD Advisory· Published Nov 11, 2025· Updated Apr 15, 2026

CVE-2025-12813

Description

The Holiday class post calendar plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 7.1 via the 'contents' parameter. This is due to a lack of sanitization of user-supplied data when creating a cache file. This makes it possible for unauthenticated attackers to execute code on the server.

Affected products

WordPress/Holiday Class Post Calendarinferred
Range: <=7.1
Package: https://wordpress.org/plugins/holiday-class-post-calendar

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

plugins.trac.wordpress.org/browser/holiday-class-post-calendar/trunk/holiday_class_post_calendar.phpnvd
plugins.trac.wordpress.org/changesetnvd
www.wordfence.com/threat-intel/vulnerabilities/id/7f7968c4-589c-4949-9f69-4a0ba4db4ea9nvd

News mentions

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