# References * * # For more information If you have any questions or comments about this advisory: * Open an issue in () * Email us at (mailto: ) # Workarounds It's possible to fix the problem without uprading by editing the ForgotUsername page in version below 13.x, to use the following code: In version after 13.x it's also possible to edit manually the forgotusername.vm file, but it's really encouraged to upgrade the version here. Two different patches are provided: - a first one to fix the CSRF problem - a more complex one that now relies on sending an email for the Forgot username process.
# Patches This issue has been patched in XWiki 12.10.5 and 13.2RC1.
Note that since this page does not have a CSRF check it's quite easy to perform a lot of those requests. # Impact It's possible to know if a user has or not an account in a wiki related to an email address, and which username(s) is actually tied to that email by forging a request to the Forgot username page.
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