Firelight Lightbox <= 2.3.20 - Authenticated (Contributor+) Stored DOM Cross-Site Scripting via PDF beforeLoad 'href' Attribute
| CVE | CVE-2026-6454 |
|---|---|
| CVSS | 6.4 (Medium) |
| Publicly Published | July 23, 2026 |
| Last Updated | July 24, 2026 |
| Researcher |
Quốc Huy (jtwings)
- Puramu
|
Description
The Firelight Lightbox plugin for WordPress is vulnerable to Stored DOM Cross-Site Scripting in versions up to and including 2.3.20. This is due to insufficient sanitization of the href attribute value within the FancyBox V2 PDF beforeLoad JavaScript callback generated in inc/fancybox-2.php, where this.href is string-concatenated directly into an HTML string without escaping, allowing a stored href containing entity-encoded double-quotes to break out of the data attribute and inject arbitrary event handlers into the DOM. This makes it possible for authenticated attackers with contributor-level access and above to inject arbitrary web scripts into pages that execute whenever a user clicks the malicious PDF link.
Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.
References
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
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Vulnerability Details for Firelight Lightbox
| Software Type | Plugin |
|---|---|
| Software Slug | easy-fancybox (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 2.3.21, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Firelight Lightbox
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