Use of Password Hash With Insufficient Computational Effort
Koel before 5.1.4 lacks login throttling, lacks a password strength policy, and shows whether a failed login attempt had a valid username. This might make brute-force attacks easier.
CWE-916 - Use of Password Hash With Insufficient Computational Effort
The software generates a hash for a password, but it uses a scheme that does not provide a sufficient level of computational effort that would make password cracking attacks infeasible or expensive.