Known vulnerabilities in Firelight Lightbox

Formerly Easy Fancybox. The most popular WordPress lightbox plugin. Simple, fast, and responsive. Opens images, videos, PDFs, and custom popups.

4Reported vulnerabilities

6.4Highest CVSS score

2.3.22Latest version

200,000+Active installs

What to do now

Update Firelight Lightbox to 2.3.21 or later. 4 of these have a fixed version available. Updating resolves them.

Plugin last updated: July 16, 2026 / Tested up to WordPress: 7.0.4 / View on wordpress.org

Reported vulnerabilities

Ordered by how urgently they need attention — whether a vulnerability is actually being exploited, and how likely exploitation is, rather than CVSS severity alone.

CVE	Severity	Exploit probability next 30 days	Affected versions	Fixed in	Published
CVE-2019-16524	Medium 4.8	1.0%	Before 1.8.18	`1.8.18`	September 26, 2019
CVE-2026-6454	Medium 6.4	0.2%	0 to 2.3.20 (inclusive)	`2.3.21`	July 24, 2026
CVE-2025-52707	Medium 6.4	0.2%	2.3.16 and earlier	`2.3.17`	June 19, 2025
CVE-2024-50460	Medium 6.4	0.2%	2.3.3 and earlier	`2.3.4`	October 24, 2024

Sources: vulnerability records from NVD, exploitation from CISA KEV, exploit probability from EPSS. Affected versions come from CPE ranges or from the reporting CNA.