Allowing long password leads to denial of service in polonel/trudesk in GitHub repository polonel/trudesk prior to 1.2.2. This vulnerability can be abused by doing a DDoS attack for which genuine users will not able to access resources/applications.
https://github.com/polonel/trudesk/commit/e836d04d16787c2c9c72e7bf011cf396d1f73c19