Impact

It's possible for an unprivileged user to perform a remote code execution by injecting a groovy script in her own profile and by calling the Reset password feature since the feature is performing a save of the user profile with programming rights in the impacted versions of XWiki.

Patches

The problem has been patched in XWiki 13.1RC1 with a complete refactoring of the Reset password feature.

Workarounds

There's different possible workarounds, all consisting in modifying the XWiki/ResetPassword page.

• the Reset password feature can be entirely disabled by deleting the XWiki/ResetPassword page
• the script in XWiki/ResetPassword can also be modified or removed: an administrator can replace it with a simple email contact to ask an administrator to reset the password.

References

https://jira.xwiki.org/browse/XWIKI-16661

For more information

If you have any questions or comments about this advisory:

• Open an issue in Jira
• Email us at Security mailing-list