Persistent XSS Vulnerability in MyBB Forum Software
CVE-2019-12830

8.7HIGH

Key Information:

Vendor

Mybb

Status
Mybb
Vendor
CVE Published:
15 June 2019

What is CVE-2019-12830?

A vulnerability in MyBB versions prior to 1.8.21 allows attackers to exploit a parsing flaw within the Private Message and Post renderer. This flaw gives rise to a persistent XSS attack via [video] BBCode, enabling malicious users to potentially take over any forum account. The exploit is associated with a specific nested video MyCode issue that, if left unpatched, poses a significant risk to user accounts and the integrity of the forum.

References

https://blog.ripstech.com/2019/mybb-stored-xss-to-rce/
x_refsource_MISC
https://blog.mybb.com/2019/06/10/mybb-1-8-21-released-sec...
x_refsource_MISC

CVSS V3.1

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.