WP Ultimate Review vulnerabilities

The WP Ultimate Review plugin for WordPress in versions up to and including 2.4.3 is vulnerable to arbitrary shortcode execution due to improper validation of a value before running do_shortcode. The bypass relies on WordPress's strip_shortcodes() function unwrapping the [[tag]] double-bracket escape to a bare [tag] that survives wp_insert_post storage and fires when the publicly queryable xs_review post type is rendered through the_content.

The WP Ultimate Review plugin for WordPress in versions up to and including 2.4.3 is vulnerable to arbitrary shortcode execution due to improper validation of a value before running do_shortcode. The nonce required to pass the only gate is emitted to unauthenticated visitors via the public review form, and submitted shortcode payloads are auto-published without admin approval by default.

The WP Ultimate Review WordPress plugin before 2.4.4 does not escape some of its review overview settings before outputting them in posts, which could allow users with a role as low as author to perform Stored Cross-Site Scripting attacks, when author reviews are enabled.

The WP Ultimate Review WordPress plugin before 2.4.4 does not prevent unauthenticated users from storing crafted review content that makes the reviewed page fail with a fatal error on every subsequent visit, resulting in a persistent denial of service when the WP Ultimate Review WordPress plugin before 2.4.4's review display settings have never been saved.

The WP Ultimate Review WordPress plugin before 2.4.4 does not validate that a submitted review rating is numeric before storing it and later using it in numeric operations when rendering reviews, allowing unauthenticated users to make the reviewed content fail with a fatal error for all visitors until the review is removed (a persistent denial of service), when user reviews are enabled.

The WP Ultimate Review WordPress plugin before 2.4.4 does not properly sanitise and escape reviews submitted through its public review form, which is available to unauthenticated visitors, allowing them to perform Stored Cross-Site Scripting attacks against any user, including administrators, viewing a page displaying the review, when user reviews are enabled.

The WP Ultimate Review plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 2.4.2. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode, making it possible for authenticated attackers with subscriber-level access and above to execute arbitrary shortcodes.

The Wp Ultimate Review WordPress plugin has a missing authorization vulnerability, allowing exploitation of incorrectly configured access control security levels. This issue affects versions up to and including 2.3.8.