# Firelight Lightbox <= 2.3.23 - Authenticated (Contributor+) Stored Cross-Site Scripting via Image Block src Attribute

- **ID:** WPSEC-2026-0483
- **Plugin:** Firelight Lightbox (`easy-fancybox`), https://wordpress.org/plugins/easy-fancybox/
- **Affected versions:** from 2.1.7 before 2.3.24
- **Fixed in:** 2.3.24 (Update to 2.3.24 or later.)
- **Severity:** Medium 6.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **Usage among sites WPSec scans:** plugin High, affected versions High (as of 2026-10-06)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/easy-fancybox
- **Fix released:** 2026-10-05
- **Published:** 2026-10-06
- **URL:** https://wpsec.com/vuln/WPSEC-2026-0483/

## Description

The Firelight Lightbox plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the src attribute of unlinked image blocks in all versions up to, and including, 2.3.23 due to the plugin's inline JavaScript concatenating the image source URL into an HTML anchor string without escaping when wrapping unlinked images for the lightbox. 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.

## References

- https://wpsec.com/vuln/WPSEC-2026-0483/
- https://plugins.svn.wordpress.org/easy-fancybox/tags/2.3.24/
- https://wordpress.org/plugins/easy-fancybox/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-0483/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.