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CVE-2011-10018

CRITICAL

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published8/13/2025

Last Modified8/14/2025

Sourcenvd

Honeypot Sightings0

Affected Products

mybb:mybb

Weaknesses (CWE)

CWE-94CWE-912

References

https://blog.mybb.com/2011/10/06/1-6-4-security-vulnerabilit/(disclosure@vulncheck.com)

https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/mybb_backdoor.rb(disclosure@vulncheck.com)

https://web.archive.org/web/20111015224948/http://secunia.com/advisories/46300/(disclosure@vulncheck.com)

https://www.exploit-db.com/exploits/17949(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/mybb-backdoor-arbitrary-command-execution(disclosure@vulncheck.com)

https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/mybb_backdoor.rb(134c704f-9b21-4f2e-91b3-4a467353bcc0)

https://www.exploit-db.com/exploits/17949(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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