CVE-2026-4379

| EUVD-2026-20034 MEDIUM
2026-04-08 Wordfence GHSA-2gmw-2prf-4jf5
6.4
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

3
EUVD ID Assigned
Apr 08, 2026 - 03:45 euvd
EUVD-2026-20034
Analysis Generated
Apr 08, 2026 - 03:45 vuln.today
CVE Published
Apr 08, 2026 - 02:25 nvd
MEDIUM 6.4

Tags

WordPress XSS

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.

Analysis

LightPress Lightbox plugin for WordPress allows authenticated attackers with Contributor-level access and above to inject arbitrary JavaScript via the unescaped `group` attribute in the `[gallery]` shortcode, resulting in stored cross-site scripting that executes for all users viewing affected pages. The vulnerability affects all versions up to 2.3.4 and has been addressed in version 2.3.5.

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Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +32
POC: 0

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CVE-2026-4379 vulnerability details – vuln.today
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