Highlights
Auth Bypass: 2 prior fixes. Scrutinize any change in this area.
Todo.Api/Users/UsersApi.cs: most-fixed (1 issue). Treat as high-risk during review.
1 high-severity fix in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
Auth Bypass: Unencrypted social login provider keys transmitted from the BFF to the core API could allow untrusted clients to directly invoke token exchange endpoints and impersonate users. The fix applied symmetric encryption using Data Protection.
Auth Bypass: Valid JWT tokens could be used to access API endpoints even if the corresponding user account had been deleted or revoked, because the system lacked a real-time database existence check during token validation.