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CVE-2025-54001 - Vulnerability Analysis

CriticalCVSS: 9.8

Last Updated: March 5, 2026

ThemeREX Classter - Insecure Deserialization

Published: March 5, 2026Updated: March 5, 2026Remote Exploitable

Overview

ThemeREX Classter <= 2.5 contains an insecure deserialization vulnerability caused by deserialization of untrusted data, letting attackers perform object injection remotely, exploit requires no special privileges.

Severity & Score

Severity: Critical

CVSS Score: 9.8

EPSS Score: 4.1%(Probability of exploitation in next 30 days)

Impact

Attackers can execute arbitrary code or commands remotely by exploiting insecure deserialization.

Mitigation

Update to the latest version beyond 2.5.

References

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

Social Media Activity(1 post)

TheHackerWire

@thehackerwire

Mar 5, 2026

🔴 CVE-2025-54001 - Critical (9.8) Deserialization of Untrusted Data vulnerability in ThemeREX Classter classter allows Object Injection.This issue affects Classter: from n/a through <= 2.5. 🔗 https://www.thehackerwire.com/vulnerability/CVE-2025-54001/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack

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Related Resources

Details

CVE ID: CVE-2025-54001
Severity: Critical
CVSS Score: 9.8
Type: insecure_deserialization
Status: unconfirmed
EPSS: 4.1%
Social Posts: 1

CWE

CWE-502

CVSS Metrics

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score

4.1%Probability of exploitation in the next 30 days