جزئیات آسیب‌پذیری

A remote PHP code execution vulnerability exists in InstantCMS version 1.6 and earlier due to unsafe use of eval() within the search view handler. Specifically, user-supplied input passed via the look parameter is concatenated into a PHP expression and executed without proper sanitation. A remote attacker can exploit this flaw by sending a crafted HTTP GET request with a base64-encoded payload in the Cmd header, resulting in arbitrary PHP code execution within the context of the web server.

• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/instantcms_exec.rb exploit
• https://packetstorm.news/files/id/122176 exploit
• https://www.vulncheck.com/advisories/instantcms-remote-php-code-execution third-party-advisory
• https://www.exploit-db.com/exploits/26622 exploit