CVE-2025-47947
ModSecurity Denial of Service Vulnerability
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.
INFO
Published Date :
May 21, 2025, 10:15 p.m.
Last Modified :
June 20, 2025, 4:13 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-47947.
| URL | Resource |
|---|---|
| https://github.com/owasp-modsecurity/ModSecurity/pull/3389 | Issue Tracking Patch |
| https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-859r-vvv8-rm8r | Exploit Vendor Advisory |
| https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-859r-vvv8-rm8r | Exploit Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-47947 vulnerability anywhere in the article.
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Cyber Security News
New ModSecurity WAF Vulnerability Let Attackers Crash the System
A significant denial of service vulnerability has been discovered in ModSecurity, one of the most widely deployed open-source web application firewall (WAF) engines used to protect Apache, IIS, and Ng ... Read more
The following table lists the changes that have been made to the
CVE-2025-47947 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Jun. 20, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:trustwave:modsecurity:*:*:*:*:*:*:*:* versions up to (excluding) 2.9.9 Added Reference Type GitHub, Inc.: https://github.com/owasp-modsecurity/ModSecurity/pull/3389 Types: Issue Tracking, Patch Added Reference Type CISA-ADP: https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-859r-vvv8-rm8r Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-859r-vvv8-rm8r Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 22, 2025
Action Type Old Value New Value Added Reference https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-859r-vvv8-rm8r -
New CVE Received by [email protected]
May. 21, 2025
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-1050 Added Reference https://github.com/owasp-modsecurity/ModSecurity/pull/3389 Added Reference https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-859r-vvv8-rm8r
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-47947 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-47947
weaknesses.