CVE-2019-12830

PoC —

CVSS 3.0

8.7 high

EPSS

<1%p60

Published

Jun 15, 2019 (Jun 15, 2019)

Modified

Jun 17, 2026

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.

Vendors: mybb
Products: mybb
Weakness: CWE-79
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

NVD CVE.org GitHub PoCs EPSS (1.0%)

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