CVE-2025-23016 :: Enginsight Vulnerability Database

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
mitre	CNA	9.3 CRITICAL	LOCAL	LOW	NONE	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 45.31%

Early Detection

Affected products identified ahead of NVD analysis through intelligence sources.

Vendor	Product	Version	Source
fastcgi	fcgi	2.0.0 ≤ 𝑥 ≤ 2.4.4	CNA

Debian Releases

Debian Product

Codename

libfcgi

bookworm	2.4.2-2+deb12u1 fixed
bullseye	vulnerable
bullseye (security)	2.4.2-2+deb11u1 fixed
forky	2.4.5-0.1 fixed
sid	2.4.5-0.1 fixed
trixie	2.4.5-0.1 fixed

Ubuntu Releases

Ubuntu Product

Codename

libfcgi

bionic	needed
focal	needed
jammy	Fixed 2.4.2-2ubuntu0.1 released
noble	Fixed 2.4.2-2.1ubuntu0.24.04.1 released
oracular	Fixed 2.4.2-2.1ubuntu0.24.10.1 released
plucky	Fixed 2.4.2-2.1ubuntu0.25.04.1 released
questing	Fixed 2.4.5-0.1 released
resolute	Fixed 2.4.5-0.1 released
xenial	needed

openSUSE / SLES Releases

openSUSE Product

Release

FastCGI

suse enterprise desktop 15 SP6	2.4.0-150000.4.3.1 fixed
suse enterprise desktop 15 SP7	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP3	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP4	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP5	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP6	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP7	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP2	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP3	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP4	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP5	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP6	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP7	2.4.0-150000.4.3.1 fixed

FastCGI-devel

suse enterprise desktop 15 SP6	2.4.0-150000.4.3.1 fixed
suse enterprise desktop 15 SP7	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP3	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP4	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP5	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP6	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP7	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP2	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP3	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP4	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP5	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP6	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP7	2.4.0-150000.4.3.1 fixed

libfcgi0

suse enterprise desktop 15 SP6	2.4.0-150000.4.3.1 fixed
suse enterprise desktop 15 SP7	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP3	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP4	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP5	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP6	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP7	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP2	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP3	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP4	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP5	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP6	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP7	2.4.0-150000.4.3.1 fixed

perl-FastCGI

suse enterprise desktop 15 SP6	2.4.0-150000.4.3.1 fixed
suse enterprise desktop 15 SP7	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP3	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP4	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP5	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP6	2.4.0-150000.4.3.1 fixed
suse enterprise sap 15 SP7	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP2	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP3	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP4	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP5	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP6	2.4.0-150000.4.3.1 fixed
suse enterprise server 15 SP7	2.4.0-150000.4.3.1 fixed

Azure Linux Releases

Azure Package

Release

fcgi

Azure Linux 3.0	0:2.4.5-1.azl3 fixed
CBL-Mariner 2.0	0:2.4.5-1.cm2 fixed

Common Weakness Enumeration

CWE-190 - Integer Overflow or Wraparound
The software performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control.

References

https://github.com/FastCGI-Archives/fcgi2/issues/67

https://github.com/FastCGI-Archives/fcgi2/releases/tag/2.4.5

https://www.synacktiv.com/en/publications/cve-2025-23016-exploiting-the-fastcgi-library

http://www.openwall.com/lists/oss-security/2025/04/23/4

https://lists.debian.org/debian-lts-announce/2025/10/msg00009.html

https://www.synacktiv.com/en/publications/cve-2025-23016-exploiting-the-fastcgi-library