Responsive Lightbox & Gallery <= 2.7.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via Image Link Title Attribute

ID

WPSEC-2026-0437

Plugin

Responsive Lightbox & Gallery (responsive-lightbox)

Affected

all versions before 2.7.10

Remediation

Update to 2.7.10 or later.

CVSS 3.1

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

Weakness

CWE-79

Usage

Plugin High · Affected versions High among sites WPSec scans, 2026-10-06

Attack surface

Responsive Lightbox & Gallery on WPSec AttackSurface

Fix released

2026-10-05

Published

2026-10-06

Description

The Responsive Lightbox & Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the title attribute of lightboxed image links in all versions up to, and including, 2.7.9. This is due to insufficient sanitization of the title attributes the plugin rewrites on links it opens in a lightbox, which recognised only one form of the attribute. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that execute when a user opens the affected lightbox.

References

• https://wpsec.com/vuln/WPSEC-2026-0437/
• https://plugins.svn.wordpress.org/responsive-lightbox/tags/2.7.10/
• https://wordpress.org/plugins/responsive-lightbox/

Published by WPSec. Provided as is, without warranty. Corrections: contact us.

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