Bug 2386666 (CVE-2025-54571)

Summary: CVE-2025-54571 mod_security: ModSecurity Content-Type Override Vulnerability
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: csutherl, jclere, pjindal, plodge, szappis
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in mod_security. The engine may allow attackers to manipulate the HTTP response’s Content-Type header, enabling them to influence downstream processes or applications. This manipulation can be achieved remotely without authentication. Consequently, an attacker can alter the expected content type of responses, leading to unpredictable behavior or vulnerabilities in dependent systems.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2386811, 2386812, 2386813    
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Description OSIDB Bzimport 2025-08-06 00:01:52 UTC 
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.