Input validation error in Apache HTTP Server - CVE-2025-66200

Vulnerability identifier: #VU119146

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-66200

CWE-ID: CWE-20

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to insufficient validation of user-supplied input when parsing the RequestHeader directive in .htaccess files. A local user can bypass mod_userdir+suexec security measures via AllowOverride FileInfo and run certain CGI scripts under an unexpected userid.

Apache HTTP Server
IBM HTTP Server
Gentoo Linux
SUSE Linux Enterprise Server 15 SP6
SUSE Manager Server 4.3
SUSE Manager Retail Branch Server 4.3
SUSE Manager Proxy 4.3
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Manager Proxy
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Anolis OS
macOS
Ubuntu
Server Applications Module
SUSE Package Hub 15
Basesystem Module
openSUSE Leap
openEuler
Oracle Solaris
Netezza Appliance
DevOps Code ClearCase
IBM OpenPages with Watson
IBM Cloud Pak System
WebSphere Remote Server
IBM Rational ClearQuest
IBM Rational ClearCase
IBM Business Automation Workflow
IBM Cloud Object Storage Systems
IBM Power Hardware Management Console (HMC)
mod_http2
mod_md
apache2 (Ubuntu package)
httpd-manual
httpd-devel
httpd-filesystem
mod_ssl
mod_session
mod_proxy_html
mod_ldap
httpd-tools
httpd
httpd-debuginfo
httpd-debugsource
httpd-help
apache2-tls13-worker-debuginfo
apache2
apache2-tls13-prefork-debuginfo
apache2-utils
apache2-tls13-doc
apache2-doc
apache2-prefork-debuginfo
apache2-worker
apache2-utils-debuginfo
apache2-tls13-worker
apache2-tls13-example-pages
apache2-debugsource
apache2-tls13-debugsource
apache2-tls13-devel
apache2-worker-debuginfo
apache2-prefork
apache2-debuginfo
apache2-example-pages
apache2-tls13-debuginfo
apache2-devel
apache2-tls13-utils
apache2-tls13-utils-debuginfo
apache2-tls13
apache2-tls13-prefork
apache2-event
apache2-event-debuginfo
apache2-utils-debugsource
apache2-worker-debugsource
apache2-event-debugsource
apache2-manual
apache2-prefork-debugsource
httpd (Red Hat package)
www-servers/apache

Install updates from vendor's website.

Apache HTTP Server - update to 2.4.66
Netezza Appliance - update to 1.0.1.0 fp278500
IBM Cloud Pak System - update to 2.3.5.1
macOS - addressed in versions 14.8.5 23J423, 15.7.5 24G624, 26.4 25E246
mod_http2 - update to 1.15.7-10
mod_md - update to 2.0.8-8
apache2 (Ubuntu package) - addressed in versions 2.4.7-1ubuntu4.22+esm12, 2.4.18-2ubuntu3.17+esm17, 2.4.29-1ubuntu4.27+esm7, 2.4.29-1ubuntu4.27+esm8, 2.4.41-4ubuntu3.23+esm3, 2.4.52-1ubuntu4.18, 2.4.52-1ubuntu4.19, 2.4.58-1ubuntu8.10, 2.4.58-1ubuntu8.11, 2.4.64-1ubuntu3.2, 2.4.64-1ubuntu3.3
httpd-manual - update to 2.4.37-655.0.1
httpd-devel - update to 2.4.37-655.0.1
httpd-filesystem - update to 2.4.37-655.0.1
mod_ssl - update to 2.4.37-655.0.1
mod_session - update to 2.4.37-655.0.1
mod_proxy_html - update to 2.4.37-655.0.1
mod_ldap - update to 2.4.37-655.0.1
httpd-tools - update to 2.4.37-655.0.1
httpd - update to 2.4.37-655.0.1
mod_ldap - addressed in versions 2.4.43-32, 2.4.51-27, 2.4.58-12
httpd - addressed in versions 2.4.43-32, 2.4.51-27, 2.4.58-12
httpd-debuginfo - addressed in versions 2.4.43-32, 2.4.51-27, 2.4.58-12
httpd-debugsource - addressed in versions 2.4.43-32, 2.4.51-27, 2.4.58-12
httpd-devel - addressed in versions 2.4.43-32, 2.4.51-27, 2.4.58-12
httpd-tools - addressed in versions 2.4.43-32, 2.4.51-27, 2.4.58-12
mod_md - addressed in versions 2.4.43-32, 2.4.51-27, 2.4.58-12
mod_proxy_html - addressed in versions 2.4.43-32, 2.4.51-27, 2.4.58-12
mod_session - addressed in versions 2.4.43-32, 2.4.51-27, 2.4.58-12
mod_ssl - addressed in versions 2.4.43-32, 2.4.51-27, 2.4.58-12
httpd-filesystem - addressed in versions 2.4.43-32, 2.4.51-27, 2.4.58-12
httpd-help - addressed in versions 2.4.43-32, 2.4.51-27, 2.4.58-12
apache2-tls13-worker-debuginfo - update to 2.4.51-35.75.1
apache2 - addressed in versions 2.4.51-35.75.1, 2.4.51-150400.6.52.1, 2.4.58-150600.5.41.1, 2.4.62-150700.4.9.1, 2.4.66-150400.6.57.1
apache2-tls13-prefork-debuginfo - update to 2.4.51-35.75.1
apache2-utils - addressed in versions 2.4.51-35.75.1, 2.4.51-150400.6.52.1, 2.4.58-150600.5.41.1, 2.4.62-150700.4.9.1, 2.4.66-150400.6.57.1
apache2-tls13-doc - update to 2.4.51-35.75.1
apache2-doc - addressed in versions 2.4.51-35.75.1, 2.4.51-150400.6.52.1, 2.4.66-150400.6.57.1
apache2-prefork-debuginfo - addressed in versions 2.4.51-35.75.1, 2.4.51-150400.6.52.1, 2.4.58-150600.5.41.1, 2.4.62-150700.4.9.1, 2.4.66-150400.6.57.1
apache2-worker - addressed in versions 2.4.51-35.75.1, 2.4.51-150400.6.52.1, 2.4.58-150600.5.41.1, 2.4.62-150700.4.9.1, 2.4.66-150400.6.57.1
apache2-utils-debuginfo - addressed in versions 2.4.51-35.75.1, 2.4.51-150400.6.52.1, 2.4.58-150600.5.41.1, 2.4.62-150700.4.9.1, 2.4.66-150400.6.57.1
apache2-tls13-worker - update to 2.4.51-35.75.1
apache2-tls13-example-pages - update to 2.4.51-35.75.1
apache2-debugsource - addressed in versions 2.4.51-35.75.1, 2.4.51-150400.6.52.1, 2.4.58-150600.5.41.1, 2.4.62-150700.4.9.1, 2.4.66-150400.6.57.1
apache2-tls13-debugsource - update to 2.4.51-35.75.1
apache2-tls13-devel - update to 2.4.51-35.75.1
apache2-worker-debuginfo - addressed in versions 2.4.51-35.75.1, 2.4.51-150400.6.52.1, 2.4.58-150600.5.41.1, 2.4.62-150700.4.9.1, 2.4.66-150400.6.57.1
apache2-prefork - addressed in versions 2.4.51-35.75.1, 2.4.51-150400.6.52.1, 2.4.58-150600.5.41.1, 2.4.62-150700.4.9.1, 2.4.66-150400.6.57.1
apache2-debuginfo - addressed in versions 2.4.51-35.75.1, 2.4.51-150400.6.52.1, 2.4.58-150600.5.41.1, 2.4.62-150700.4.9.1, 2.4.66-150400.6.57.1
apache2-example-pages - addressed in versions 2.4.51-35.75.1, 2.4.51-150400.6.52.1, 2.4.66-150400.6.57.1
apache2-tls13-debuginfo - update to 2.4.51-35.75.1
apache2-devel - addressed in versions 2.4.51-35.75.1, 2.4.51-150400.6.52.1, 2.4.58-150600.5.41.1, 2.4.62-150700.4.9.1, 2.4.66-150400.6.57.1
apache2-tls13-utils - update to 2.4.51-35.75.1
apache2-tls13-utils-debuginfo - update to 2.4.51-35.75.1
apache2-tls13 - update to 2.4.51-35.75.1
apache2-tls13-prefork - update to 2.4.51-35.75.1
apache2-event - addressed in versions 2.4.51-150400.6.52.1, 2.4.58-150600.5.41.1, 2.4.62-150700.4.9.1, 2.4.66-150400.6.57.1
apache2-event-debuginfo - addressed in versions 2.4.51-150400.6.52.1, 2.4.58-150600.5.41.1, 2.4.62-150700.4.9.1, 2.4.66-150400.6.57.1
apache2-utils-debugsource - addressed in versions 2.4.58-150600.5.41.1, 2.4.62-150700.4.9.1
apache2-worker-debugsource - addressed in versions 2.4.58-150600.5.41.1, 2.4.62-150700.4.9.1
apache2-event-debugsource - addressed in versions 2.4.58-150600.5.41.1, 2.4.62-150700.4.9.1
apache2-manual - update to 2.4.58-150600.5.41.1
apache2-prefork-debugsource - addressed in versions 2.4.58-150600.5.41.1, 2.4.62-150700.4.9.1
httpd (Red Hat package) - addressed in versions 2.4.62-7.el9_7.3, 2.4.63-4.el10_1.3
www-servers/apache - update to 2.4.68
IBM Cloud Object Storage Systems - addressed in versions 3.20.0.43, 3.20.0.69
IBM HTTP Server - addressed in versions 8.5.5.29, 9.0.5.27
IBM OpenPages with Watson - update to 9.0.5.26
IBM Power Hardware Management Console (HMC) - addressed in versions 10.3.1063.2, 11.1.1111.5
Oracle Solaris - addressed in versions 11.3 ESU 36.35, 11.4 SRU 89

• https://downloads.apache.org/httpd/CHANGES_2.4#2.4.66
• https://httpd.apache.org/security/vulnerabilities_24.html
• https://lists.apache.org/thread/qsqgjfh3opl1zyqvky8wxpdhctkgc0s5

• Multiple vulnerabilities in Apache HTTP Server
• SUSE update for apache2
• Red Hat Enterprise Linux 8 update for the httpd:2.4 module
• Red Hat Enterprise Linux 10 update for httpd
• SUSE update for apache2
• Anolis OS update for httpd:2.4 module
• Red Hat Enterprise Linux 9 update for httpd
• SUSE update for apache2
• SUSE update for apache2
• Multiple vulnerabilities in IBM Business Automation Workflow traditional
• Multiple vulnerabilities in IBM HTTP Server
• Multiple vulnerabilities in IBM WebSphere Remote Server
• Ubuntu update for apache2
• Multiple vulnerabilities in Oracle Solaris
• Multiple vulnerabilities in IBM DevOps Code ClearCase
• Multiple vulnerabilities in IBM Rational ClearQuest
• openEuler 20.03 LTS SP4 update for httpd
• openEuler 24.03 LTS SP1 update for httpd
• openEuler 24.03 LTS update for httpd
• Ubuntu update for apache2
• openEuler 24.03 LTS SP2 update for httpd
• openEuler 22.03 LTS SP4 update for httpd
• Multiple vulnerabilities in IBM OpenPages
• Multiple vulnerabilities in Apple macOS Tahoe
• Multiple vulnerabilities in macOS Sequoia
• Multiple vulnerabilities in Apple macOS Sonoma
• Multiple vulnerabilities in IBM Power Hardware Management Console (HMC)
• Multiple vulnerabilities in IBM Netezza Appliance
• Multiple vulnerabilities in IBM Cloud Object System
• Ubuntu update for apache2
• Ubuntu update for apache2
• Multiple vulnerabilities in IBM Cloud Pak System
• SUSE update for apache2
• Gentoo update for Apache HTTPD