CVEvulnerability
CVE-2011-10018
10.0 CRITICAL
Official page ↗
- Status
- Analyzed
- Published
- 2025-08-13
- Last modified
- 2026-06-16
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 10.0 CRITICAL — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-912, CWE-94
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.
Affected configurations
• mybb mybb 1.6.4
Related
References
- https://blog.mybb.com/2011/10/06/1-6-4-security-vulnerabilit/ Vendor Advisory
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/mybb_backdoor.rb Product
- https://web.archive.org/web/20111015224948/http://secunia.com/advisories/46300/ Third Party Advisory
- https://www.exploit-db.com/exploits/17949 Exploit
- https://www.vulncheck.com/advisories/mybb-backdoor-arbitrary-command-execution Third Party Advisory
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/mybb_backdoor.rb Product
- https://www.exploit-db.com/exploits/17949 Exploit