CVE-2023-25403: Yf-Exam Project Yf-Exam

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

CleverStupidDog yf-exam v 1.8.0 is vulnerable to Authentication Bypass. The program uses a fixed JWT key, and the stored key uses username format characters. Any user who logged in within 24 hours. A token can be forged with his username to bypass authentication.

Affected products

Published 2023-03-03. Last modified 2026-06-17.