CVE-2025-40907

MEDIUM EPSS 40.0%
Published May 16, 20251y ago · Modified Jun 17, 20262w ago
5.3 CVSS 3.1
Medium
Find Similar
Published May 16, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
5.3
Exploitability
3.9
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability Low

Threat Intelligence

EPSS Exploit Probability
40.0% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-122
CWE-190 Integer Overflow or Wraparound Numeric Error

Affected Products 1

VendorProductVersionRange
fastcgifcgi*≥0.44  –  ≤0.82

References 6

  • openwall.com http://www.openwall.com/lists/oss-security/2025/04/23/4
    Mailing ListThird Party Advisory
  • github.com https://github.com/FastCGI-Archives/fcgi2/issues/67
    ExploitIssue Tracking
  • github.com https://github.com/FastCGI-Archives/fcgi2/releases/tag/2.4.5
    Release Notes
  • github.com https://github.com/perl-catalyst/FCGI/issues/14
    ExploitIssue Tracking
  • patch-diff.githubusercontent.com https://patch-diff.githubusercontent.com/raw/FastCGI-Archives/fcgi2/pull/74.patch
    Patch
  • synacktiv.com https://www.synacktiv.com/en/publications/cve-2025-23016-exploiting-the-fastcgi-library
    ExploitThird Party Advisory

Remediation