The WP Photo Album Plus plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 8.7.02.003. This is due to the plugin allowing unauthenticated users to execute an action that does not properly validate a value before running doshortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes.

The WP Photo Album Plus plugin for WordPress is vulnerable to Stored Cross-Site Scripting via REQUESTURI Session History in all versions up to, and including, 9.3.03.002 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The bypass works because escurlraw() strips literal angle brackets but retains HTML entities, which wppaEntityDecode() silently converts back to live HTML tags before jQuery('#wppa-modal-container').html() renders them.

The WP Photo Album Plus plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'wppa-tab' parameter in all versions up to, and including, 8.8.05.003 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 a user into performing an action such as clicking on a link.

The WP Photo Album Plus WordPress plugin before 9.2.09.002 does not check that the current user is allowed to upload into the album they target when it processes a front-end upload, allowing any authenticated user, such as a Subscriber, to upload files into albums owned by other users or by the administrator. Exploitation requires the WP Photo Album Plus WordPress plugin before 9.2.09.002's front-end user upload feature to be enabled, which is not the default.