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Description

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.

PUBLISHED Reserved 2026-03-18 | Published 2026-04-08 | Updated 2026-04-13 | Assigner Wordfence




MEDIUM: 6.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status
unaffected

Any version
affected

Timeline

2026-03-23:Vendor Notified
2026-04-07:Disclosed

Credits

Muhammad Yudha - DJ finder

References

www.wordfence.com/...-70c5-40b7-8d8d-f43f3baa0f3d?source=cve

plugins.trac.wordpress.org/...x/class-wp-jquery-lightbox.php

plugins.trac.wordpress.org/...x/class-wp-jquery-lightbox.php

plugins.trac.wordpress.org/.../wp-jquery-lightbox/tags/2.3.5

cve.org (CVE-2026-4379)

nvd.nist.gov (CVE-2026-4379)

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