CVE-2025-66200

MEDIUM5.4EPSS 0.04%

Apache HTTP Server: mod_userdir+suexec bypass via AllowOverride FileInfo

Published: 12/5/2025Modified: 12/9/2025

Also known as:ALPINE-CVE-2025-66200BIT-apache-2025-66200

Description

mod_userdir+suexec bypass via AllowOverride FileInfo vulnerability in Apache HTTP Server. Users with access to use the RequestHeader directive in htaccess can cause some CGI scripts to run under an unexpected userid. This issue affects Apache HTTP Server: from 2.4.7 through 2.4.65. Users are recommended to upgrade to version 2.4.66, which fixes the issue.

Affected packages (3)

Alpine/apache2from 0, < 2.4.66-r0
Bitnami/apache>= 2.4.7, < 2.4.66
Debian/apache2from 0, < 2.4.66-1~deb11u1

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

References (5)

ADVISORYhttps://security.alpinelinux.org/vuln/CVE-2025-66200
ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2025-66200
WEBhttps://httpd.apache.org/security/vulnerabilities_24.html
WEBhttps://nvd.nist.gov/vuln/detail/CVE-2025-66200
WEBhttp://www.openwall.com/lists/oss-security/2025/12/04/8