ExploitPublished 15 Jun 2025

PHP CGI Module 8.3.4 · Remote Code Execution (RCE)

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Severity

Critical

Rated by Threat Radar

Data as of 21 Jun 2025, 23:58 UTC

What to do

AI-suggested

European organizations should immediately audit their web servers to identify any instances running PHP CGI Module version 8.3.4 or similar vulnerable builds. Since no official patches are currently linked, organizations should consider the following specific mitigations: 1) Disable the PHP CGI module if not required, or switch to PHP-FPM or other more secure PHP execution methods. 2) Implement strict input validation and web application firewalls (WAFs) configured to detect and block suspicious payloads targeting PHP CGI interfaces. 3) Restrict access to CGI scripts by IP whitelisting or network segmentation to limit exposure. 4) Monitor web server logs for unusual requests or patterns indicative of exploitation attempts. 5) Prepare incident response plans to quickly isolate and remediate compromised systems. 6) Stay updated with vendor advisories for official patches and apply them promptly once available. These targeted actions go beyond generic advice by focusing on the specific attack vector and PHP CGI usage patterns.

Description

PHP CGI Module 8.3.4 - Remote Code Execution (RCE)

Impact

For European organizations, the impact of this vulnerability can be severe. Successful exploitation could lead to full system compromise, allowing attackers to steal sensitive data, disrupt services, or use compromised servers as a foothold for further attacks within the network. Given the widespread use of PHP in European web infrastructure, especially in government, finance, healthcare, and e-commerce sectors, the risk of data breaches and service outages is significant. The ability to execute arbitrary code remotely without authentication increases the likelihood of automated exploitation attempts, potentially leading to large-scale attacks. Additionally, compromised servers could be used to launch attacks on other critical infrastructure or to distribute malware, amplifying the threat landscape across Europe.

Indicators of compromise

Exploit source code

Exploit code for PHP CGI Module 8.3.4 - Remote Code Execution (RCE)PHP · 11,901 characters

#!/usr/bin/env python3

# Exploit Title: PHP CGI Module 8.3.4 - Remote Code Execution (RCE)
# Date: 2025-06-13
# Exploit Author: @ibrahimsql
# Exploit Author's github: https://github.com/yigitsql ( old account banned )
# Vendor Homepage: https://www.php.net/
# Software Link: https://www.php.net/downloads
# Version: PHP < 8.3.4, PHP < 8.2.17, PHP < 8.1.27
# Tested on: Kali Linux 2024.1
# CVE: CVE-2024-4577
# Description:
# A critical vulnerability in PHP's CGI implementation allows remote attacke…

References

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