ModSecurity’s Insufficient Return Value Handling can Lead to XSS and Source Code Disclosure

CVE Details

Basic Information

Title ModSecurity’s Insufficient Return Value Handling can Lead to XSS and Source Code Disclosure
Type cve
Published 2025-08-05T23:39:40.712Z
Modified 2025-08-05T23:39:40.712Z

Product Information

Vendor owasp-modsecurity
Product ModSecurity
Version < 2.9.12

CVSS Information

Base Score 6.9 (MEDIUM)
Attack Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

AI Analysis

AI Description ModSecurity versions prior to 2.9.12 have a vulnerability where an attacker can override HTTP response Content-Type headers, potentially leading to XSS attacks and source code exposure.
AI Severity High
AI Vendor OWASP Foundation
AI Product ModSecurity
AI Version < 2.9.12

Affected Products

  • owasp-modsecurity ModSecurity < 2.9.12

Additional Information

CWE List CWE-252
Source GitHub_M

Description

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. In versions 2.9.11
and below, an attacker can override the HTTP response’s Content-Type, which could lead to several issues depending on the HTTP scenario. For example, we have demonstrated the potential for XSS and arbitrary script source code disclosure in the latest version of mod_security2. This issue is fixed in version 2.9.12.

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