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Servers and applications

CVE-2023-45556

ACP Themes persistent XSS

Severity
Medium 5.4
Published
4 Nov 2023
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
1.8.37
Also known as
GHSA-4xqm-3cm2-5xgf
Sources
NVD, Project advisories (GitHub)

Description

Cross Site Scripting vulnerability in Mybb Mybb Forums v.1.8.33 allows a local attacker to execute arbitrary code via the theme Name parameter in the theme management component.

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-2023-45556
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-45556
  • GitHub Advisory Database https://github.com/advisories/GHSA-4xqm-3cm2-5xgf
  • github.com https://github.com/mybb/mybb/security/advisories/GHSA-4xqm-3cm2-5xgf