CVE-2025-13889: Tmus Simple Nivo Slider

Medium severity, CVSS 6.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The Simple Nivo Slider plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'id' shortcode parameter in all versions up to, and including, 0.5.6 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

• Tmus Simple Nivo Slider: up to and including 0.5.6

Published 2025-12-12. Last modified 2026-10-07.