CVE-2025-23016 is a critical integer overflow vulnerability in FastCGI fcgi2 versions 2.x through 2.4.4, specifically in the ReadParams function of fcgiapp.c, which can lead to a heap-based buffer overflow via crafted nameLen or valueLen data sent to the IPC socket. With a CVSS score of 9.3 (CRITICAL), this vulnerability is remotely exploitable with low attack complexity, requiring no user interaction, and can result in complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation, a public exploit write-up exists, and the vulnerability has garnered some community discussion, indicating potential for future exploitation.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2.0.0, <= 2.4.4CPE match | cpe:2.3:a:fastcgi:fcgi:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.7 Bluesky, 0.3 Mastodon, and 1.0 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.