Critical · 9.8 CVE-2025-54001 EUVD-2025-208299GHSA-ghg7-3qr4-cjr3

WordPress Classter theme <= 2.5 - PHP Object Injection vulnerability

Published Mar 5, 2026 · Updated Apr 28, 2026 · Assigned by Patchstack

Description

Deserialization of Untrusted Data vulnerability in ThemeREX Classter classter allows Object Injection.This issue affects Classter: from n/a through <= 2.5.

Affected products

Vendor	Product	Affected	Fixed
ThemeREX	Classter	≤ 2.5	—

References

https://patchstack.com/database/Wordpress/Theme/classter/vulnerability/wordpress-classter-theme-2-5-php-object-injection-vulnerability?_s_id=cve vdb-entry