Cross-Site Request Forgery (CSRF) vulnerability in UpdraftPlus.Com, DavidAnderson UpdraftPlus WordPress Backup Plugin <= 1.23.3 versions leads to sitewide Cross-Site Scripting (XSS).

The UpdraftPlus: WordPress Backup & Migration Plugin plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.23.10. This is due to a lack of nonce validation and insufficient validation of the instanceid on the 'updraftmethod-googledrive-auth' action used to update Google Drive remote storage location. This makes it possible for unauthenticated attackers to modify the Google Drive location that backups are sent to via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. This can make it possible for attackers to receive backups for a site which may contain sensitive information.

DISPUTED The UpdraftPlus plugin through 1.13.12 for WordPress has SSRF in the updraftajaxhandler function in /wp-content/plugins/updraftplus/admin.php via an httpget subaction. NOTE: the vendor reports that this does not cross a privilege boundary.

DISPUTED The UpdraftPlus plugin through 1.13.12 for WordPress allows remote PHP code execution because the pluploadaction function in /wp-content/plugins/updraftplus/admin.php has a race condition before deleting a file associated with the name parameter. NOTE: the vendor reports that this does not cross a privilege boundary.