All vulnerabilities

Servers and applications

CVE-2011-10018

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…

Severity
Critical 10.0
Published
13 Aug 2025
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
MyBBServers and applications · cpe:a:mybb:mybb
  • Version 1.6.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2011-10018
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2011-10018