CVE-2025-13857: Ksakai Yet Another Webclap For WordPress

Medium severity, CVSS 6.4. EPSS: 0.2% chance of exploitation in the next 30 days.

The Yet Another WebClap for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'text' parameter of the webclap_button shortcode in all versions up to, and including, 0.2 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

• Ksakai Yet Another Webclap For WordPress: up to and including 0.2

Published 2025-12-06. Last modified 2026-06-17.