CVE-2025-54001 PUBLISHED

WordPress Classter theme <= 2.5 - PHP Object Injection vulnerability

Assigner: Patchstack
Reserved: 16.07.2025 Published: 05.03.2026 Updated: 05.03.2026

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

Product Status

Vendor	ThemeREX
Product	Classter
Versions	Default: unaffected affected from n/a to <= 2.5 (incl.)

Credits

Tran Nguyen Bao Khanh (VCI - VNPT Cyber Immunity) | Patchstack Bug Bounty Program finder

References

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

Problem Types

Deserialization of Untrusted Data CWE

Impacts

Object Injection