Vulnerability DatabaseCVE-2025-40907
Mend.io Vulnerability Database
The largest open source vulnerability database
What is a Vulnerability ID?
New vulnerability? Tell us about it!
CVE-2025-40907
May 16, 2025
FCGI versions 0.44 through 0.82, for Perl, include a vulnerable version of the FastCGI fcgi2 (aka fcgi) library. The included FastCGI library is affected by CVE-2025-23016, causing 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.
Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (6)
http://www.openwall.com/lists/oss-security/2025/04/23/4
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
https://patch-diff.githubusercontent.com/raw/FastCGI-Archives/fcgi2/pull/74.patch
https://github.com/perl-catalyst/FCGI/issues/14
Do you need more information?
Contact Us
CVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Integer Overflow or Wraparound
CWE-190
Heap-based Buffer Overflow
CWE-122
Dependency on Vulnerable Third-Party Component
CWE-1395
EPSS
Base Score:
0.25