Vulnerability Monitor

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CVE-2025-47947

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Versions up to and including 2.9.8 are vulnerable to denial of service in one special case (in stable released versions): when the payload's content type is `application/json`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.

Published

2025-05-21T22:15:50.963

Last Modified

2025-06-20T16:13:40.530

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

Weaknesses

Type: Secondary
CWE-1050

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	trustwave	modsecurity	< 2.9.9	Yes

References

https://github.com/owasp-modsecurity/ModSecurity/pull/3389 Issue Tracking, Patch ([email protected])
https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-859r-vvv8-rm8r Exploit, Vendor Advisory ([email protected])
https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-859r-vvv8-rm8r Exploit, Vendor Advisory (134c704f-9b21-4f2e-91b3-4a467353bcc0)