What is CVE-2025-54001?

CVE-2025-54001 is a critical-severity vulnerability in Themerex Classter, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-03-05.

How severe is CVE-2025-54001?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in Themerex Classter

CVE-2025-54001

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

Vulnerability class: Insecure Deserialization

EPSS: 0.005 (40.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Themerex Classter — versions 0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2025-54001?: CVE-2025-54001 is a critical-severity vulnerability in Themerex Classter, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-03-05.
How severe is CVE-2025-54001?: Critical severity. CVSS v3 base score is 9.8 out of 10.