CVE-2021-47735

CMSimple 5.4 contains an authenticated remote code execution vulnerability that allows logged-in attackers to inject malicious PHP code into template files. Attackers can exploit the template editing functionality by crafting a reverse shell payload and saving it through the template editing endpoint with a valid CSRF token.

• https://www.cmsimple.org/
• https://www.exploit-db.com/exploits/50356
• https://www.vulncheck.com/advisories/cmsimple-authenticated-remote-code-execution-via-template-editing