CVE-2011-10018

Description

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.

PUBLISHED Reserved 2025-08-13 | Published 2025-08-13 | Updated 2025-08-14 | Assigner VulnCheck

Problem types

CWE-912 Hidden Functionality

CWE-94 Improper Control of Generation of Code ('Code Injection')

Product status

Credits

MyBB finder

References

raw.githubusercontent.com/...ts/unix/webapp/mybb_backdoor.rb exploit

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

web.archive.org/...4948/http://secunia.com/advisories/46300/ third-party-advisory

blog.mybb.com/2011/10/06/1-6-4-security-vulnerabilit/ vendor-advisory patch

www.vulncheck.com/...bb-backdoor-arbitrary-command-execution third-party-advisory

cve.org (CVE-2011-10018)

nvd.nist.gov (CVE-2011-10018)

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