CVE-2023-45556: Mybb

Medium severity, CVSS 5.4. EPSS: 0.5% chance of exploitation in the next 30 days.

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 products

• Mybb Mybb: before 1.8.37 (fixed in 1.8.37)

Published 2023-11-06. Last modified 2026-06-17.