CVE-2025-58098: Apache HTTP Server: Server Side Includes adds query string to #exec cmd=...

Severity: high (CVSS 8.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-05 · updated 2026-09-25
Weakness: CWE-201

Description

Apache HTTP Server 2.4.65 and earlier with Server Side Includes (SSI) enabled and mod_cgid (but not mod_cgi) passes the shell-escaped query string to #exec cmd="..." directives. This issue affects Apache HTTP Server before 2.4.66. Users are recommended to upgrade to version 2.4.66, which fixes the issue.

Affected products

Apache HTTP Server: before 2.4.66 — fixed in 2.4.66

How to fix

Upgrade to a fixed version: Apache HTTP Server 2.4.66. Check the vendor advisory for mitigations.

References

https://httpd.apache.org/security/vulnerabilities_24.html
http://www.openwall.com/lists/oss-security/2025/12/04/5

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