In macrozheng mall-tiny 1.0.1, an attacker can send null data through the resource creation interface resulting in a null pointer dereference occurring in all subsequent operations that require authentication, which triggers a denial-of-service attack and service restart failure.

macrozheng mall-tiny 1.0.1 is vulnerable to Incorrect Access Control. The project imports users by default, and the test user is made a super administrator.

macrozheng mall-tiny 1.0.1 suffers from Insecure Permissions. The application's JWT signing keys are hardcoded and do not change. User information is explicitly written into the JWT and used for subsequent privilege management, making it is possible to forge the JWT of any user to achieve authentication bypass.

macrozheng mall-tiny 1.0.1 is vulnerable to Incorrect Access Control via the logout function. After a user logs out, their token is still available and fetches information in the logged-in state.

A vulnerability, which was classified as problematic, has been found in macrozheng mall up to 1.0.3. Affected by this issue is some unknown functionality of the component JWT Token Handler. The manipulation leads to use of default cryptographic key. The complexity of an attack is rather high. The exploitation is known to be difficult. The vendor was contacted early about this disclosure but did not respond in any way. Instead the issue posted on GitHub got deleted without any explanation.