UpHeron
All vulnerabilities

Servers and applications

CVE-2023-46251

Visual editor persistent XSS

Severity
Medium 6.1
Published
4 Nov 2023
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
1.8.37
Also known as
GHSA-wj33-q7vj-9fr8
Sources
NVD, Project advisories (GitHub)

Description

MyBB is a free and open source forum software. Custom MyCode (BBCode) for the visual editor (_SCEditor_) doesn't escape input properly when rendering HTML, resulting in a DOM-based XSS vulnerability. This weakness can be exploited by pointing a victim to a page where the visual editor is active (e.g. as a post or Private Message) and operates on a maliciously crafted MyCode message. This may…

Affected software

SoftwareAffected versions
MyBBServers and applications · cpe:a:mybb:mybb
  • Every version before 1.8.37
MyBBServers and applications · github:mybb/mybb
  • Every version before 1.8.37

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-46251
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-46251
  • GitHub Advisory Database https://github.com/advisories/GHSA-wj33-q7vj-9fr8
  • github.com https://github.com/mybb/mybb/security/advisories/GHSA-wj33-q7vj-9fr8