CVE-2025-54571

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. In versions 2.9.11and 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.

CVSS v4.0

6.9 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

0.28% chance of exploitation in the next 30 days, 20th percentile

Published

2025-08-05

Updated

2025-11-03

Proof-of-concept exploits (1)

• owasp-modsecurity/ModSecurity/security/advisories/GHSA-cg44-9m43-3f9v

References

• CVE Record
• NVD entry

Related

• CVE-2025-54554
• CVE-2025-54574
• CVE-2025-54510
• CVE-2025-54581
• CVE-2025-54494
• CVE-2025-54583