CVE-2024-13399: Gosign – Posts Slider Block

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

The Gosign – Posts Slider Block plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'posts-slider-block' block in all versions up to, and including, 1.1.0 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

• Gosign Gosign – Posts Slider Block: up to and including 1.1.0

Published 2025-01-31. Last modified 2026-06-17.