CVE-2025-66200NVD

Vulnerability Summary

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 Level

MEDIUM(5.4)

Published Date

Dec 5, 2025

Last Modified

Oct 18, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.65%Probability

Root Weakness (CWE)

CWE-288: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v3.1 Base Metrics — Score 5.4 (MEDIUM)

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

ConfidentialityNone

IntegrityLow

AvailabilityLow

Affected & Patched Versions

Affected Versions

Apache Http Server >= 2.4.7 and < 2.4.66

Patched Versions

Apache Http Server 2.4.66

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