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CVE-2026-6454 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CNA: [email protected]CVSS-B:6.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://plugins.trac.wordpress.org/browser/easy-fancybox/tags/2.3.18/fancybox/2.2.0/jquery.fancybox.js#L1235	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/browser/easy-fancybox/tags/2.3.18/fancybox/2.2.0/jquery.fancybox.js#L280	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/browser/easy-fancybox/tags/2.3.18/inc/fancybox-2.php#L322	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/browser/easy-fancybox/trunk/fancybox/2.2.0/jquery.fancybox.js#L1235	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/browser/easy-fancybox/trunk/fancybox/2.2.0/jquery.fancybox.js#L280	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/browser/easy-fancybox/trunk/inc/fancybox-2.php#L322	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/changeset?reponame=&old=3610643%40easy-fancybox&new=3610643%40easy-fancybox	[email protected]	Source CodeVendor
https://www.wordfence.com/threat-intel/vulnerabilities/id/8396c124-9c72-4801-8964-1cd5fbd52d20?source=cve	[email protected]	AdvisoryBundleRemedy

see all 8 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	[email protected]

Affected Products

Product	Versions
Firelight Lightbox	<= 2.3.20 (semver)
CPE cpe:2.3:a:firelightwp:firelight_lightbox::::::wordpress::* Remediation Upgrade: 2.3.21moderate effort

Change History

2 change records found show changes

Date	Action	Recorded By
Jul 24, 2026	CVE Modified	CISA-ADP
Jul 24, 2026	New CVE Received	[email protected]