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CVE-2026-6454

MEDIUM 6.4 CVSS 3.1
Published
July 24, 2026
Last modified
July 24, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

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.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • firelightwp Firelight Lightbox — Up to and including 2.3.20

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/easy-fancybox/tags/2.3.18/fancybox/2.2.0/jquery.fancybox.js#L1235
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/easy-fancybox/tags/2.3.18/fancybox/2.2.0/jquery.fancybox.js#L280
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/easy-fancybox/tags/2.3.18/inc/fancybox-2.php#L322
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/easy-fancybox/trunk/fancybox/2.2.0/jquery.fancybox.js#L1235
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/easy-fancybox/trunk/fancybox/2.2.0/jquery.fancybox.js#L280
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/easy-fancybox/trunk/inc/fancybox-2.php#L322
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?reponame=&old=3610643%40easy-fancybox&new=3610643%40easy-fancybox
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/8396c124-9c72-4801-8964-1cd5fbd52d20?source=cve
  • nvd.nist.gov Official NVD record