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CVE-2025-66200

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Date: December 5, 2025

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.

Severity Score

Related Resources (5)

http://www.openwall.com/lists/oss-security/2025/12/04/8
https://httpd.apache.org/security/vulnerabilities_24.html
https://nvd.nist.gov/vuln/detail/CVE-2025-66200
https://seclists.org/oss-sec/2025/q4/244
https://www.mend.io/vulnerability-database/CVE-2025-66200

Severity Score

Weakness Type (CWE)

Authentication Bypass Using an Alternate Path or Channel

CWE-288

Incorrect Privilege Assignment

CWE-266

Top Fix

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Upgrade Version

Upgrade to version https://github.com/apache/httpd.git - 2.4.66

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): NONE

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