Potential fix for code scanning alert no. 14: URL redirection from remote source #20
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…mote source Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
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Potential fix for https://github.com/GitTimeraider/Directadmin-Emailforwarder/security/code-scanning/14
To fix the open redirect vulnerability, we should validate the
next_pageparameter before using it in a redirect. The best way is to ensure that the redirect target is a relative path (i.e., does not contain a scheme or netloc), which prevents redirection to external sites. This can be done using Python'surllib.parse.urlparseto check that both theschemeandnetlocattributes are empty. Additionally, we should remove any backslashes from the input, as browsers may treat them as path separators. If the validation fails, we should redirect to a safe default (e.g., the home page or index). The changes should be applied to both places wherenext_pageis used: lines 35 and 57 inapp/auth.py. We need to importurlparsefromurllib.parse.Suggested fixes powered by Copilot Autofix. Review carefully before merging.