Worked on the twentyhq/twenty repository to enhance security around post-login redirects, focusing on mitigating open redirect vulnerabilities. Addressed a critical bug by updating the isValidReturnToPath validator in TypeScript to reject return paths containing backslashes, thereby preventing unauthorized external redirects. Developed and integrated comprehensive unit tests to ensure that backslash-tricked paths are consistently identified as invalid, increasing the reliability of the login flow. Collaborated with other contributors to align changes with established security guidelines. No new user-facing features were introduced during this period, with efforts concentrated on strengthening security and improving test coverage in the front end codebase.