CVE-2026-2021: Contrid Slideshow Gallery Lite

Medium severity, CVSS 6.4. EPSS: 0.2% chance of exploitation in the next 30 days.

The Slideshow Gallery LITE plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'alwaysauto' shortcode attribute in all versions up to, and including, 1.8.5. This is 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

• Contrid Slideshow Gallery Lite: up to and including 1.8.5

Published 2026-06-18. Last modified 2026-06-18.