CVE-2025-65082 Apache HTTP Server: CGI environment variable override

What is CVE-2025-65082?

CVE-2025-65082 is a medium-severity vulnerability in Apache Http Server, published on 5 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache HTTP Server through environment variables set via the Apache configuration unexpectedly superseding variables calculated by the server for CGI programs.

This issue affects Apache HTTP Server from 2.4.0 through 2.4.65.

Users are recommended to upgrade to version 2.4.66 which fixes the issue.

Weakness: CWE-150

Which versions are affected by CVE-2025-65082?

1 open source package ship an affected version, including apache. It affects 1 product.

Products include Apache Http Server.

How do I fix CVE-2025-65082?

Upgrade apache to 2.4.66 or later.

Is CVE-2025-65082 being exploited?

There is no known exploitation of CVE-2025-65082 in the wild and no public exploit code.

Other vulnerabilities in Apache Http Server

• CVE-2021-42013 Apache HTTP Server Path Traversal Exploited Critical 9.8
• CVE-2024-38475 Apache HTTP Server Improper Escaping of Output Exploited Critical 9.1
• CVE-2021-40438 Apache HTTP Server-Side Request Forgery (SSRF) Exploited Critical 9.0
• CVE-2019-0211 Apache HTTP Server Privilege Escalation Exploited High 7.8
• CVE-2021-41773 Apache HTTP Server Path Traversal Exploited High 7.5

All Apache Http Server vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2025-65082, AZL-71525, AZL-71596, BELL-CVE-2025-65082, BIT-apache-2025-65082, DEBIAN-CVE-2025-65082 and 3 more.