Photo Gallery < 1.5.75 - Stored Cross-Site Scripting via Uploaded SVG

The plugin did not ensure that uploaded SVG files added to a gallery do not contain malicious content. As a result, users allowed to add images to gallery can upload an SVG file containing JavaScript code, which will be executed when accessing the image directly (ie in the /wp-content/uploads/photo-gallery/ folder), leading to a Cross-Site Scripting (XSS) issue

PoC

When editing or creating a gallery, Click ‘Add Images’ then ‘Upload Files’ and upload an SVG with JavaScript code, then access the uploaded image from the uploads folder directly, e.g https://example.com/wp-content/uploads/photo-gallery/xss.svg Example of malicious SVG: