PT-2019-12972 · Mybb · Mybb

Robin Peraglie + 1 · Published 2019-06-15 · Updated 2019-06-20 · CVE-2019-12830

Positive Technologies (AI Summary)

CVSS v3.1

8.7

High

Base vector

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

Name of the Vulnerable Software and Affected Versions MyBB versions prior to 1.8.21

Description The issue is related to a parsing flaw in the Private Message / Post renderer, specifically a nested video MyCode issue, which can lead to persistent XSS. This allows an attacker to potentially take over any forum account.

Recommendations For versions prior to 1.8.21, update to version 1.8.21 or later to resolve the issue.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2019-12830

Affected Products

Mybb

References · 4

• 🔥 https://blog.ripstech.com/2019/mybb-stored-xss-to-rce · Exploit
• https://osv.dev/vulnerability/CVE-2019-12830 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-12830 · Security Note
• https://blog.mybb.com/2019/06/10/mybb-1-8-21-released-security-maintenance-release · Note