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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

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

Patches

Vulnerability mechanics

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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