CVE-2026-4379
MediumCVSS 6.4Exploitation Probability (EPSS)
Low risk18th percentile - higher than 18% of all known CVEs
Summary
The LightPress Lightbox plugin for WordPress up to version 2.3.4 contains a stored XSS vulnerability via the `group` attribute in the `[gallery]` shortcode. Lack of proper escaping allows authenticated attackers with Contributor-level access and above to inject arbitrary scripts that execute when a page is viewed.
Risk Assessment
Attackers can hijack user sessions, steal data, or conduct phishing attacks on the WordPress site.
Recommendation
Update the LightPress Lightbox plugin to the latest version. Restrict user privileges to the minimum necessary.
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Original NVD description (English source)
The LightPress Lightbox plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `group` attribute in the `[gallery]` shortcode in all versions up to, and including, 2.3.4. This is due to the plugin modifying gallery shortcode output to include the `group` attribute value without proper escaping. 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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS