Tiny File Manager version 2.4.8 allows an unauthenticated remote attacker to access the application's internal files. This is possible because the application is vulnerable to broken access control.
Tiny File Manager version 2.4.8 executes the code of files uploaded by users of the application, instead of just returning them for download. This is possible because the application is vulnerable to insecure file upload.
Tiny File Manager version 2.4.8 allows an unauthenticated remote attacker to persuade users to perform unintended actions within the application. This is possible because the application is vulnerable to CSRF.