Multi Functional Flexi Lightbox, CVE-2026-3347

CVE, Research URL: CVE-2026-3347
Home page URL: Security reports for Multi Functional Flexi Lightbox
Application: Multi Functional Flexi Lightbox
Published on: Mar 21, 2026
Research Description: The Multi Functional Flexi Lightbox plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `arv_lb[message]` parameter in all versions up to, and including, 1.2 due to insufficient input sanitization and output escaping. This is due to the `arv_lb_options_val()` sanitize callback returning user input without any sanitization, and the stored `message` value being output in the `genLB()` function without escaping. This makes it possible for authenticated attackers, with Administrator-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses a page or post with the lightbox enabled.
Affected versions: max 1.2.
Status: vulnerable