Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in gt3themes Photo Gallery - GT3 Image Gallery & Gutenberg Block Gallery allows Stored XSS. This issue affects Photo Gallery - GT3 Image Gallery & Gutenberg Block Gallery: from n/a through 2.7.7.25.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.