CVE-2011-10018

CRITICAL10.0

myBB 1.6.4 Backdoor Arbitrary Command Execution

Published Aug 13, 2025

Modified 3 months ago

Details

myBB version 1.6.4 was distributed with an unauthorized backdoor embedded in the source code. The backdoor allowed remote attackers to execute arbitrary PHP code by injecting payloads into a specially crafted collapsed cookie. This vulnerability was introduced during packaging and was not part of the intended application logic. Exploitation requires no authentication and results in full compromise of the web server under the context of the web application.

References

ADVISORY

https://blog.mybb.com/2011/10/06/1-6-4-security-vulnerabilit/

DETECTION

https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/mybb_backdoor.rb

ADVISORY

https://web.archive.org/web/20111015224948/http://secunia.com/advisories/46300/

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2011-10018

DETECTION

https://www.exploit-db.com/exploits/17949

ADVISORY