CVE-2025-52891
Medium
Description
ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. In versions 2.9.8 to before 2.9.11, an empty XML tag can cause a segmentation fault. If SecParseXmlIntoArgs is set to On or OnlyArgs, and the request type is application/xml, and at least one XML tag is empty (eg <foo></foo>), then a segmentation fault occurs. This issue has been patched in version 2.9.11. A workaround involves setting SecParseXmlIntoArgs to Off.
SeverityMedium
CVSS6.5
Exploit probability—
ProductModSecurity
PublishedJul 2, 2025
First seenJul 2, 2025
Weakness typeCWE-20Improper input validation
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| owasp-modsecurity ModSecurity | >= 2.9.8, < 2.9.11 | — |
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