XSS in Owasp Modsecurity
CVE-2025-54571
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Owasp Modsecurity
- Owasp-Modsecurity Modsecurity — versions < 2.9.12
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-cg44-9m43-3f9v (Exploit, Vendor Advisory)
- github.com/owasp-modsecurity/ModSecurity/issues/2514 (Exploit, Issue Tracking)
- github.com/owasp-modsecurity/ModSecurity/commit/6d7e8eb18f2d7d368fb8e29516fcdea… (Patch)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-54571?
- CVE-2025-54571 is a medium-severity vulnerability in Owasp Modsecurity, classified under CWE-252. CVSS score: 6.1/10. Published 2025-08-06.
- How severe is CVE-2025-54571?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2025-54571 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.