CVE-2025-66200

Apache HTTP Server: mod_userdir+suexec bypass via AllowOverride FileInfo

Published Dec 5, 2025 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Debian DLA Debian DLA DLA-4452-1 apache2 security update
Ubuntu USN Ubuntu USN USN-7968-1 Apache HTTP Server vulnerabilities
Ubuntu USN Ubuntu USN USN-8338-1 Apache HTTP Server vulnerabilities
History
Type Values Removed Values Added
CPEs cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Apache
Apache http Server
Vendors & Products Apache
Apache http Server
Type Values Removed Values Added
Weaknesses CWE-288
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Apache HTTP Server: mod_userdir+suexec bypass via AllowOverride FileInfo
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Dec 5, 2025, 5:38 PM
Reserved
Nov 24, 2025, 3:58 PM
Status
Analyzed
Published
Dec 5, 2025, 11:15 AM
Modified
Oct 18, 2026, 2:10 PM
Severity
Moderate
Public date
Dec 5, 2025, 11:02 AM