CVE-2026-5717: Knighthawk Vi: Include Post By

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

The VI: Include Post By plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'class_container' attribute of the 'include-post-by-cat' shortcode in all versions up to, and including, 0.4.200706 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

• Knighthawk Vi: Include Post By: up to and including 0.4.200706

Published 2026-04-15. Last modified 2026-06-17.