Fix code scanning alert no. 234: URL redirection from remote source #512
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Fixes https://github.com/grandnode/grandnode2/security/code-scanning/234
To fix the problem, we should ensure that the
returnUrlparameter is validated against a known list of safe URLs or ensure it is a relative URL. This can be done by maintaining a list of authorized redirects and checking thereturnUrlagainst this list before performing the redirection. If thereturnUrlis not in the list, it should default to a safe URL like the home page.Suggested fixes powered by Copilot Autofix. Review carefully before merging.