CVE-2025-66200

Publication date 5 December 2025

Last updated 2 June 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.4 · Medium

Score breakdown

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.

Status

Package Ubuntu Release Status
apache2 26.04 LTS resolute
Fixed 2.4.66-2ubuntu1
25.10 questing
Fixed 2.4.64-1ubuntu3.2
25.04 plucky Ignored end of life, was needs-triage
24.04 LTS noble
Fixed 2.4.58-1ubuntu8.10
22.04 LTS jammy
Fixed 2.4.52-1ubuntu4.18
20.04 LTS focal
Fixed 2.4.41-4ubuntu3.23+esm3
18.04 LTS bionic
Fixed 2.4.29-1ubuntu4.27+esm7
16.04 LTS xenial
Fixed 2.4.18-2ubuntu3.17+esm17
14.04 LTS trusty
Fixed 2.4.7-1ubuntu4.22+esm12

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
apache2

Severity score breakdown

Parameter Value
Base score 5.4 · Medium
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact Low
Availability impact Low
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

References

Related Ubuntu Security Notices (USN)

    • USN-7968-1
    • Apache HTTP Server vulnerabilities
    • 19 January 2026
    • USN-8338-1
    • Apache HTTP Server vulnerabilities
    • 28 May 2026

Other references

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