Implementation trusts the "me" field returned by the authorization server without verifying it
Critical severity
GitHub Reviewed
Published
Nov 19, 2020
in
simonw/datasette-indieauth
•
Updated Sep 7, 2023
Description
Reviewed
Nov 24, 2020
Published to the GitHub Advisory Database
Nov 24, 2020
Last updated
Sep 7, 2023
Impact
A malicious user can sign in as a user with any IndieAuth identifier. This is because the implementation does not verify that the final
"me"URL value returned by the authorization server belongs to the same domain as the initial value entered by the user.Patches
Version 1.1 fixes this issue.
Workarounds
There is no workaround. Upgrade to 1.1 immediately.
References
For more information
If you have any questions or comments about this advisory:
References