#VU119146 Input validation error in Apache HTTP Server - CVE-2025-66200

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Main Vulnerability Database Vulnerabilities #VU119146

#VU119146 Input validation error in Apache HTTP Server - CVE-2025-66200

Published: December 4, 2025 / Updated: December 5, 2025


Vulnerability identifier: #VU119146
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-66200
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
Apache HTTP Server
Software vendor:
Apache Foundation

Description

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to insufficient validation of user-supplied input when parsing the RequestHeader directive in .htaccess files. A local user can bypass mod_userdir+suexec security measures via AllowOverride FileInfo and run certain CGI scripts under an unexpected userid.


Remediation

Install updates from vendor's website.

External links