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CVE-2025-23016

Quick assessment

Affected
FastCGI fcgi
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

fcgi2是FastCGI-Archives开源的一个 FastCGI 开发人员工具包。 fcgi2 2.x版本至2.4.4版本存在安全漏洞，该漏洞源于存在整数溢出，攻击者可以通过精心设计的nameLen或valueLen值将数据发送到IPC套接字。

CVSS 9.3 · Critical EPSS 0.61% · P48

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-23016

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
fcgi2 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
fcgi2是FastCGI-Archives开源的一个 FastCGI 开发人员工具包。 fcgi2 2.x版本至2.4.4版本存在安全漏洞，该漏洞源于存在整数溢出，攻击者可以通过精心设计的nameLen或valueLen值将数据发送到IPC套接字。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Shenlong Deep Dive — AI Deep Analysis

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Affected Products

Vendor Product Affected Versions CPE Subscribe
FastCGI fcgi 2.0.0 ~ 2.4.4 -

II. Public POCs for CVE-2025-23016

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 14140 chars
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III. Intelligence Information for CVE-2025-23016

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Patches & Fixes for CVE-2025-23016 (1)

Proof of Concept for CVE-2025-23016 (1)

News Coverage for CVE-2025-23016 (1)

IV. Related Vulnerabilities

Same product: fcgi
Same weakness: CWE-190

V. Comments for CVE-2025-23016

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