CircuitVerse Implements LTI 1.3 Login Endpoint, Fixes Security Gaps Found by CodeQL

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CircuitVerse shipped the first stage of its LTI 1.3 integration this week, implementing the /lti/login endpoint that handles the OpenID Connect initiation request from a Learning Management System. The controller, built in around 64 lines of code with 150 lines of tests, redirects the LMS to an authorization URL after resolving the incoming credentials to a registered deployment. A CodeQL scan flagged a potential CSRF vulnerability caused by broadly skipping token verification, which was resolved by overriding the verification predicate to apply only to the specific parameters expected in an LTI login request. Code review surfaced three additional issues — ambiguous deployment lookups, unvalidated authorization URLs that could allow redirects to malicious endpoints, and registered query parameters being silently dropped — all of which were addressed before merging. A separate debugging session traced a database schema mismatch to an abandoned proof-of-concept migration from earlier in the project, highlighting the risk of leaving experimental migrations applied to a development database.

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