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CVE-2025-48866

ModSecurity has possible DoS vulnerability in sanitiseArg action

Published: Jun 2, 2025Updated: Jul 2, 2025 Sources: CVE List NVD BDUCWE-1050
7.5HIGH
NVD MITRE
EPSS Score
0.8%
Top 47.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Versions prior to 2.9.10 contain a denial of service vulnerability similar to GHSA-859r-vvv8-rm8r/CVE-2025-47947. The `sanitiseArg` (and `sanitizeArg` - this is the same action but an alias) is vulnerable to adding an excessive number of arguments, thereby leading to denial of service. Version 2.9.10 fixes the issue. As a workaround, avoid using rules that contain the `sanitiseArg` (or `sanitizeArg`) action.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-1050

Affected Products

OWASP Foundation, Inc.
oss-project
ModSecurityMixed
Security Products / vuln-mgmt-scanner
ООО «НЦПР»
commercial·RU
МСВСфераOn-prem
Operating Systems / linux-distro
owasp-modsecurity
oss-projectaka modsecurity, mod_security
ModSecurityOn-prem
Networking Infrastructure / firewall
owasp
oss-project·USaka modsecurity-crs, modsecurity, owasp modsecurity core rule set
modsecurityMixed
Networking Infrastructure / firewall

Exploitability

Official Patch Available
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References

https://github.com/owasp-modsecurity/ModSecurity/wiki/Reference-Manual-(v2.x)#sanitisearg
github.com
https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-f82j-8pp7-cw2w
github.com
https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-859r-vvv8-rm8r
github.com
and 5 more references View all →

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