CVE-2011-10018
MyBB Unauthorized Remote Code Execution Backdoor
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.
INFO
Published Date :
Aug. 13, 2025, 9:15 p.m.
Last Modified :
Aug. 14, 2025, 5:42 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2011-10018.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2011-10018 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2011-10018
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2011-10018 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2011-10018 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 14, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:mybb:mybb:1.6.4:*:*:*:*:*:*:* Added Reference Type VulnCheck: https://blog.mybb.com/2011/10/06/1-6-4-security-vulnerabilit/ Types: Vendor Advisory Added Reference Type VulnCheck: https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/mybb_backdoor.rb Types: Product Added Reference Type VulnCheck: https://web.archive.org/web/20111015224948/http://secunia.com/advisories/46300/ Types: Third Party Advisory Added Reference Type VulnCheck: https://www.exploit-db.com/exploits/17949 Types: Exploit Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/mybb-backdoor-arbitrary-command-execution Types: Third Party Advisory Added Reference Type CISA-ADP: https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/mybb_backdoor.rb Types: Product Added Reference Type CISA-ADP: https://www.exploit-db.com/exploits/17949 Types: Exploit -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 14, 2025
Action Type Old Value New Value Added Reference https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/mybb_backdoor.rb Added Reference https://www.exploit-db.com/exploits/17949 -
New CVE Received by [email protected]
Aug. 13, 2025
Action Type Old Value New Value Added 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. Added CVSS V4.0 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 Added CWE CWE-94 Added CWE CWE-912 Added Reference https://blog.mybb.com/2011/10/06/1-6-4-security-vulnerabilit/ Added Reference https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/mybb_backdoor.rb Added Reference https://web.archive.org/web/20111015224948/http://secunia.com/advisories/46300/ Added Reference https://www.exploit-db.com/exploits/17949 Added Reference https://www.vulncheck.com/advisories/mybb-backdoor-arbitrary-command-execution