The UpdraftPlus: WP Backup & Migration Plugin plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the showdata and initiate_restore parameters in all versions up to, and including, 1.24.12 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick an admin user into performing an action such as clicking on a link.

The UpdraftPlus: WP Backup & Migration Plugin plugin for WordPress is vulnerable to PHP Object Injection in all versions from 1.23.8 to 1.24.11 via deserialization of untrusted input in the 'recursive_unserialized_replace' function. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present. An administrator must perform a search and replace action to trigger the exploit.

Missing Authorization vulnerability in MainWP MainWP UpdraftPlus Extension.This issue affects MainWP UpdraftPlus Extension: from n/a through 4.0.6.

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 instance_id 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.

Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in Paul Kehrer Updraft plugin <= 0.6.1 versions.

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 Plugin WordPress plugin before 1.22.9 does not sanitise and escape the updraft_interval parameter before outputting it back in an admin page, leading to a Reflected Cross-Site Scripting (XSS) vulnerability.

The UpdraftPlus WordPress plugin Free before 1.22.3 and Premium before 2.22.3 do not properly validate a user has the required privileges to access a backup's nonce identifier, which may allow any users with an account on the site (such as subscriber) to download the most recent site & database backup.

The UpdraftPlus WordPress Backup Plugin WordPress plugin before 1.16.69 does not sanitise and escape the updraft_restore parameter before outputting it back in the Restore page, leading to a Reflected Cross-Site Scripting

The UpdraftPlus WordPress Backup Plugin WordPress plugin before 1.6.59 does not sanitise its updraft_service settings, allowing high privilege users to set malicious JavaScript payload in it and leading to a Stored Cross-Site Scripting issue