HTTP Response Manipulation Vulnerability in ModSecurity Web Application Firewall
CVE-2025-54571

6.9MEDIUM

Key Information:

Vendor: Owasp-modsecurity
Status: Modsecurity
Vendor: CVE Published:; 6 August 2025

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What is CVE-2025-54571?

ModSecurity, an open-source web application firewall for Apache, IIS, and Nginx, has a vulnerability in versions 2.9.11 and earlier that allows attackers to manipulate the HTTP response’s Content-Type. This manipulation can lead to serious security risks, including Cross-Site Scripting (XSS) and unauthorized disclosure of script source code. This issue was addressed in version 2.9.12, highlighting the importance of keeping security software up to date to mitigate potential threats.