The Woostify plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.5.0 This is due to insufficient input sanitization and output escaping in the bundled Lity.js lightbox library, where user-controlled input from the href attribute is concatenated directly into a jQuery HTML string without sanitization. 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.
https://themes.trac.wordpress.org/changeset?old_path=%2Fwoostify/2.5.0&new_path=%2Fwoostify/2.5.1
https://themes.trac.wordpress.org/browser/woostify/2.4.6/assets/js/lity.js#L635
https://themes.trac.wordpress.org/browser/woostify/2.4.6/assets/js/lity.js#L611
https://themes.trac.wordpress.org/browser/woostify/2.4.6/assets/js/lity.js#L163
https://themes.trac.wordpress.org/browser/woostify/2.4.6/assets/js/lity.js#L142
https://github.com/woostify/woostify/commit/a4669598aa8c5de344dda6c3d42389a3c2e61adc