CVE-2025-12813
Holiday class post calendar <= 7.1 - Unauthenticated Remote Code Execution via 'contents'
criticalImproper Control of Generation of Code ('Code Injection')
9.8
CVSS Score
9.8
CVSS Score
critical
Severity
7.2
Patched in
31d
Time to patch
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.
CVSS Vector Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAttack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
High
Confidentiality
High
Integrity
High
Availability
Technical Details
Affected versions
<=7.1PublishedNovember 10, 2025
Last updatedDecember 11, 2025
Affected pluginholiday-class-post-calendar
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