CVE-2025-54571

Public Exploit
ModSecurity's Insufficient Return Value Handling can Lead to XSS and Source Code Disclosure

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.

Category

6.9
CVSS
Severity: Medium
CVSS 4.0 •
EPSS 0.04%
Affected: owasp-modsecurity ModSecurity
Published at:
Updated at:

References

Link Tags
https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-cg44-9m43-3f9v
https://github.com/owasp-modsecurity/ModSecurity/issues/2514
https://github.com/owasp-modsecurity/ModSecurity/commit/6d7e8eb18f2d7d368fb8e29516fcdeaeb8d349b8

Frequently Asked Questions

What is the severity of CVE-2025-54571?
CVE-2025-54571 has been scored as a medium severity vulnerability.
How to fix CVE-2025-54571?
To fix CVE-2025-54571, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-54571 being actively exploited in the wild?
It is possible that CVE-2025-54571 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-54571?
CVE-2025-54571 affects owasp-modsecurity ModSecurity.
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