CVE-2025-47947

HIGH EPSS 42.3%
Published May 21, 20251y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published May 21, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
42.3% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-1050

Affected Products 1

VendorProductVersionRange
trustwavemodsecurity* <2.9.9

References 2

  • github.com https://github.com/owasp-modsecurity/ModSecurity/pull/3389
    Issue TrackingPatch
  • github.com https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-859r-vvv8-rm8r
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/owasp-modsecurity/ModSecurity/pull/3389
    Issue TrackingPatch