CVE-2019-12830

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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
8.7 HIGH
NETWORK
LOW
LOW
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 61%
VendorProductVersion
mybbmybb
𝑥
< 1.8.21
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
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/
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/