CVE-2011-10018
myBB version 1.6.4 was distributed with an unauthorized backdoor embedded in the source code.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.98%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 4.0
- 10.0 CRITICALCVSS: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/M
- EPSS
- 1.98% probability · 79th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-94, CWE-912
- Affected
- mybb/mybb
- Source
- disclosure@vulncheck.com
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.rbProduct
- https://web.archive.org/web/20111015224948/http://secunia.com/advisories/46300/Third Party Advisory
- https://www.exploit-db.com/exploits/17949Exploit
- https://www.vulncheck.com/advisories/mybb-backdoor-arbitrary-command-executionThird Party Advisory
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/mybb_backdoor.rbProduct
- https://www.exploit-db.com/exploits/17949Exploit
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.