What’s Vulnerable › Vulnerabilities

CVE-2024-5878: Multiple Plugins <= (Various Versions) - Authenticated (Contributor+) Stored DOM-Based Cross-Site Scripting via SimpleLightbox JavaScript Library

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-20 · updated 2026-06-17
• Weakness: CWE-79

Description

Multiple plugins for WordPress are vulnerable to Stored Cross-Site Scripting via the plugin's bundled SimpleLightbox JavaScript library (version 2.1.5) in various versions due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

• aknieriem Simplelightbox: through 2.14.4
• Photo Gallery, Sliders, Proofing and Themes: through 3.59.4

References

• https://plugins.trac.wordpress.org/browser/nextgen-gallery/trunk/static/Lightbox/simplelightbox/nextgen_simple_lightbox_init.js
• https://plugins.trac.wordpress.org/browser/simplelightbox/trunk/dist/simple-lightbox.js
• https://plugins.trac.wordpress.org/changeset/3157076/nextgen-gallery
• https://www.wordfence.com/threat-intel/vulnerabilities/id/bcbc8ce6-5eb7-4599-b844-72eb2ff3093c?source=cve

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