CVE-2026-6454 json
Firelight Lightbox <= 2.3.20 - Authenticated (Contributor+) Stored DOM Cross-Site Scripting via PDF beforeLoad 'href' Attribute
published 3mo ago modified 3mo ago also EUVD-2026-48462
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 29%
- public exploits
- 0
- none known
Summary
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.
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3mo ago
Exploit prediction
0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- firelightwp Firelight Lightbox
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/8396c124-9c72-4801-8964-1cd5fbd52d20?source=cve
- plugins.trac.wordpress.org /browser/easy-fancybox/trunk/inc/fancybox-2.php#L322
- plugins.trac.wordpress.org /browser/easy-fancybox/trunk/fancybox/2.2.0/jquery.fancybox.js#L280
- plugins.trac.wordpress.org /browser/easy-fancybox/trunk/fancybox/2.2.0/jquery.fancybox.js#L1235
- plugins.trac.wordpress.org /browser/easy-fancybox/tags/2.3.18/inc/fancybox-2.php#L322
- plugins.trac.wordpress.org /browser/easy-fancybox/tags/2.3.18/fancybox/2.2.0/jquery.fancybox.js#L280
- plugins.trac.wordpress.org /browser/easy-fancybox/tags/2.3.18/fancybox/2.2.0/jquery.fancybox.js#L1235
- plugins.trac.wordpress.org /changeset?reponame=&old=3610643%40easy-fancybox&new=3610643%40easy-fancybox
Sources
- CVE List CVE-2026-6454
- NVD CVE-2026-6454
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.