PT-2026-23138 · Themerex · Classter

Published 2026-03-05 · Updated 2026-03-08 · CVE-2025-54001

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions ThemeREX Classter versions through 2.5

Description The software contains a flaw due to deserialization of untrusted data, which allows for object injection.

Recommendations Versions prior to 2.5 should be updated.

Fix

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2025-54001

Affected Products

Classter

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2025-54001 · Security Note
• https://twitter.com/TheHackerWire/status/2029608381108060217 · Twitter Post
• https://twitter.com/CVEnew/status/2030755404242714989 · Twitter Post
• https://patchstack.com/database/Wordpress/Theme/classter/vulnerability/wordpress-classter-theme-2-5-php-object-injection-vulnerability?_s_id=cve · Note