Vulnerability Description
In MyBB before 1.8.21, an attacker can exploit a parsing flaw in the Private Message / Post renderer that leads to [video] BBCode persistent XSS to take over any forum account, aka a nested video MyCode issue.
CVSS Score
8.7
HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mybb | Mybb | < 1.8.21 |
Related Weaknesses (CWE)
References
- https://blog.mybb.com/2019/06/10/mybb-1-8-21-released-security-maintenance-releaRelease NotesThird Party Advisory
- https://blog.ripstech.com/2019/mybb-stored-xss-to-rce/ExploitVendor Advisory
- https://blog.mybb.com/2019/06/10/mybb-1-8-21-released-security-maintenance-releaRelease NotesThird Party Advisory
- https://blog.ripstech.com/2019/mybb-stored-xss-to-rce/ExploitVendor Advisory
FAQ
What is CVE-2019-12830?
CVE-2019-12830 is a vulnerability with a CVSS score of 8.7 (HIGH). In MyBB before 1.8.21, an attacker can exploit a parsing flaw in the Private Message / Post renderer that leads to [video] BBCode persistent XSS to take over any forum account, aka a nested video MyCo...
How severe is CVE-2019-12830?
CVE-2019-12830 has been rated HIGH with a CVSS base score of 8.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-12830?
Check the references section above for vendor advisories and patch information. Affected products include: Mybb Mybb.