CVE-2026-4512: Unknown Recaptcha By Webdesignby

Low severity, CVSS 3.5. EPSS: 0.2% chance of exploitation in the next 30 days.

The reCaptcha by WebDesignBy WordPress plugin before 2.0 does not sanitize or escape the Site Key setting before outputting it in a JavaScript string context via the grecaptcha_js() function. This allows administrators on multisite installations (who do not have the unfiltered_html capability) to inject arbitrary JavaScript that executes for all visitors to the WordPress login page.

Affected products

• Unknown Recaptcha By Webdesignby: before 2.0 (fixed in 2.0)

Published 2026-04-23. Last modified 2026-06-17.