Security Fixes: User Enumeration Mitigation and Removal of Password Hash Exposure #34
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This pull request introduces two security fixes related to authentication behavior and exposure of sensitive data in user-related API responses.
1 - User Enumeration Mitigation
The authentication endpoint returned different error messages depending on whether the username existed or not.
This allowed attackers to determine valid usernames by comparing responses.
Fix implemented
Unified authentication error responses.
All invalid login attempts now return the same generic message.
2 - Removal of Password Hash Exposure
The user detail API was including password hashes in the returned data, which is unnecessary and unsafe.
Fix implemented
Sensitive fields were removed from all user-related API serializers.
Ensured password hashes are not returned under any condition.