Vulnerability Description
Cross-site Scripting (XSS) vulnerability in MyBB before 1.8.26 via Nested Auto URL when parsing messages.
CVSS Score
6.1
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mybb | Mybb | < 1.8.26 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/161908/MyBB-1.8.25-Remote-Command-ExecutionExploitThird Party AdvisoryVDB Entry
- https://blog.sonarsource.com/mybb-remote-code-execution-chainExploitThird Party Advisory
- https://github.com/mybb/mybb/security/advisories/GHSA-xhj7-3349-mqcmPatchThird Party Advisory
- http://packetstormsecurity.com/files/161908/MyBB-1.8.25-Remote-Command-ExecutionExploitThird Party AdvisoryVDB Entry
- https://blog.sonarsource.com/mybb-remote-code-execution-chainExploitThird Party Advisory
- https://github.com/mybb/mybb/security/advisories/GHSA-xhj7-3349-mqcmPatchThird Party Advisory
FAQ
What is CVE-2021-27889?
CVE-2021-27889 is a vulnerability with a CVSS score of 6.1 (MEDIUM). Cross-site Scripting (XSS) vulnerability in MyBB before 1.8.26 via Nested Auto URL when parsing messages.
How severe is CVE-2021-27889?
CVE-2021-27889 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-27889?
Check the references section above for vendor advisories and patch information. Affected products include: Mybb Mybb.