The MaxGalleria plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's maxgallery_thumb shortcode in all versions up to, and including, 6.4.4 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The MaxGalleria plugin for WordPress is vulnerable to unauthorized image upload due to a missing capability check on the add_media_library_images_to_gallery function in all versions up to, and including, 6.4.2. This makes it possible for authenticated attackers, with subscriber access or above, to upload arbitrary images to a gallery.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Petri Damstén Fullscreen Galleria allows Stored XSS.This issue affects Fullscreen Galleria: from n/a through 1.6.11.

Cross-Site Request Forgery (CSRF) vulnerability in Andy Whalen Galleria plugin <= 1.0.3 versions.

Authenticated (author or higher user role) Stored Cross-Site Scripting (XSS) vulnerability discovered in MaxGalleria WordPress plugin (versions 6.2.5).

PHP remote file inclusion vulnerability in galleria.html.php in Galleria Mambo Module 1.0 and earlier for Mambo allows remote attackers to execute arbitrary PHP code via a URL in the mosConfig_absolute_path parameter.