CVE-2025-54571

MEDIUM

6.1

CVSS v3

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.

CWE-252 CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

modsecurity-apacheDebian

Fixed in:2.9.3-3+deb11u5CVE-2025-54571

Fixed in:2.9.7-1+deb12u2CVE-2025-54571

Fixed in:2.9.11-1+deb13u1CVE-2025-54571

Fixed in:2.9.12-2CVE-2025-54571

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.28%probability of exploitation in 30 days

20thpercentile

Low risk: more likely to be exploited than 20% of all known CVEs.

References

Patch1

github.com

Exploit2

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-252 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2005-4360	High	7.8	87%	-	-
CVE-2007-3798	Critical	9.8	70%	-	Fix
CVE-2010-0211	Critical	9.8	28%	-	Fix
CVE-2022-23626	High	8.5	9.9%	-	Fix
CVE-2019-10902	High	7.5	4.0%	-	-
CVE-2018-20216	High	7.5	3.9%	-	Fix

Common questions

How do I fix CVE-2025-54571?

Upgrade modsecurity-apache on debian 11 to 2.9.3-3+deb11u5 or later.

Is CVE-2025-54571 being actively exploited?

Not that we know of. CVE-2025-54571 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.28% is the estimated probability that it will be exploited in the next 30 days. That is higher than 20% of all scored CVEs.

How severe is CVE-2025-54571?

CVE-2025-54571 has a CVSS v3 base score of 6.1, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2025-54571 affect?

Published advisories record a fix for modsecurity-apache (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-03.