CVE-2019-12830 Information

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 Vector

CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Reference

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

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

8.7