CVE-2025-23016
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.3epss 0.6%
exploitation probability
0.6%top 54% of all CVEs
observed exploitation
nono source reports it
FastCGI fcgi2 (aka fcgi) 2.x through 2.4.4 has an integer overflow (and resultant heap-based buffer overflow) via crafted nameLen or valueLen values in data to the IPC socket. This occurs in ReadParams in fcgiapp.c.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Affected products
FastCGI · fcgiReferences
https://github.com/FastCGI-Archives/fcgi2/issues/67https://github.com/FastCGI-Archives/fcgi2/releases/tag/2.4.5https://lists.debian.org/debian-lts-announce/2025/10/msg00009.htmlhttps://www.synacktiv.com/en/publications/cve-2025-23016-exploiting-the-fastcgi-libraryhttp://www.openwall.com/lists/oss-security/2025/04/23/4