CVE-2026-54224: Ubb Systems Ubb.threads

High severity, CVSS 7.1. EPSS: 0.4% chance of exploitation in the next 30 days.

UBB.threads is vulnerable to Denial of Service (DoS). By sending multiple concurrent requests to view any user profile on instances with many registered users, an authenticated attacker can easily exhaust database resources and completely deny access to the application for other users. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 7.7.5 but may also affect other versions.

Affected products

• Ubb Systems Ubb.threads: up to and including 7.7.5

Published 2026-06-18. Last modified 2026-06-18.