CVE-2026-4334: 3uu Shariff Wrapper

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

The Shariff Wrapper plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'headline' parameter in the [shariff] shortcode in all versions up to, and including, 4.6.20 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. The vulnerability occurs because the plugin uses a custom wp_kses implementation with permissive allowed HTML tags, and then performs a str_replace operation that injects HTML after sanitization, allowing event handlers to be introduced through the %total placeholder in the style attribute.

Affected products

• 3uu Shariff Wrapper: up to and including 4.6.20

Published 2026-05-28. Last modified 2026-06-17.