Vulnerability in Owasp-modsecurity Modsecurity
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 t…
EPSS: 0.006 (70.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Owasp-modsecurity Modsecurity — versions <= 2.9.8
Weakness classification (CWE)
Public proof-of-concept exploits
References
- https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-859r-vvv8-rm8r (x_refsource_CONFIRM)
- https://github.com/owasp-modsecurity/ModSecurity/pull/3389 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-47947?
- CVE-2025-47947 is a high-severity vulnerability in Owasp-modsecurity Modsecurity, classified under CWE-1050. CVSS score: 7.5/10. Published 2025-05-21.
- How severe is CVE-2025-47947?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-47947 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.