CVE-2011-10018
criticalpriority · attend · 50EPSS 0.029 · 87 %ileexploit · weaponizedEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (1)
Public proof-of-concept and weaponised exploit code.
- exploit/unix/webapp/mybb_backdoormyBB 1.6.4 Backdoor Arbitrary Command Executionweaponized · metasploit
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (17)
External citations — patches, advisories, analysis.
- http://secunia.com/advisories/46300/cnnvd
- https://blog.mybb.com/2011/10/06/1-6-4-security-vulnerabilit/cnnvd
- https://mybb.com/download/Patchcnnvd
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/mybb_backdoor.rbcnnvd
- https://web.archive.org/web/20111015224948/cnnvd
- https://www.exploit-db.com/exploits/17949cnnvd
- https://www.vulncheck.com/advisories/mybb-backdoor-arbitrary-command-executioncnnvd
- https://blog.mybb.com/2011/10/06/1-6-4-security-vulnerabilit/enisa_euvd
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