CVE-2025-63417: Selfbest

High severity, CVSS 7.2. EPSS: 0.2% chance of exploitation in the next 30 days.

A Stored Cross-Site Scripting (XSS) vulnerability in the chat functionality of the SelfBest platform 2023.3 allows authenticated attackers to inject arbitrary web scripts or HTML via the chat message input field. This malicious content is stored and then executed in the context of other users' browsers when they view the malicious message, potentially leading to session hijacking, account takeover, or other client-side attacks.

Affected products

• Selfbest Selfbest: version 2023.3 only

Published 2025-11-05. Last modified 2026-06-17.