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
References2
- httpd.apache.org/security/vulnerabilities_24.html Mailing ListVendor Advisory
- www.openwall.com/lists/oss-security/2025/12/04/5 Mailing ListThird Party Advisory
Metrics
- CVSS 3.1
-
8.3
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L - EPSS — exploit probability
- 2% percentile: 75 · as of 11 November 2026
- CWE
- CWE-201
Could this be exploited in your environment?
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