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 updraftrestore parameter before outputting it back in the Restore page, leading to a Reflected Cross-Site Scripting

The updraftplus plugin before 1.9.64 for WordPress has XSS via addqueryarg() and removequeryarg().

The updraftplus plugin before 1.13.5 for WordPress has XSS in rare cases where an attacker controls a string logged to a log file.

The UpdraftPlus WordPress Backup Plugin WordPress plugin before 1.16.66 does not sanitise and escape the backuptimestamp and jobid parameter before outputting then back in admin pages, leading to Reflected Cross-Site Scripting issues

The WP-Optimize WordPress plugin before 3.2.13, SrbTransLatin WordPress plugin before 2.4.1 use a third-party library that removes the escaping on some HTML characters, leading to a cross-site scripting vulnerability.

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

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

The WP-Optimize WordPress plugin before 4.2.0 does not properly escape user input when checking image compression statuses, which could allow users with the administrator role to conduct SQL Injection attacks in the context of Multi-Site WordPress configurations.