CVE-2025-48866
High
Description
ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Versions prior to 2.9.10 contain a denial of service vulnerability similar to GHSA-859r-vvv8-rm8r/CVE-2025-47947. The `sanitiseArg` (and `sanitizeArg` - this is the same action but an alias) is vulnerable to adding an excessive number of arguments, thereby leading to denial of service. Version 2.9.10 fixes the issue. As a workaround, avoid using rules that contain the `sanitiseArg` (or `sanitizeArg`) action.
SeverityHigh
CVSS7.5
Exploit probability—
ProductOwasp Modsecurity
PublishedJun 2, 2025
First seenJun 2, 2025
Weakness typeCWE-1050CWE-1050
How to fix
Update
- owasp modsecurity2.9.10 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| owasp modsecurity | v < 2.9.10 | 2.9.10 |
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