CVE-2025-47947

CVE Details

Release Date:2025-05-21
Impact:Important What is this?

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.

See more information about CVE-2025-47947 from MITRE CVE dictionary and NIST NVD


NOTE: The following CVSS metrics and score provided are preliminary and subject to review.


CVSS v3 metrics

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

Errata information


PlatformErrataRelease Date
Oracle Linux version 8 (mod_security) ELSA-2025-88442025-06-11
Oracle Linux version 9 (mod_security) ELSA-2025-88372025-06-11


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