CVE-2025-5337: Metaslider Slider, Gallery, And Carousel

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The Slider, Gallery, and Carousel by MetaSlider plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘aria-label’ parameter in all versions up to, and including, 3.98.0 due to insufficient input sanitization and output 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.

Affected products

• Metaslider Slider, Gallery, And Carousel: before 3.99.0 (fixed in 3.99.0)

Published 2025-06-14. Last modified 2026-06-17.