CVE-2021-24478: Bookshelf Project Bookshelf

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

The Bookshelf WordPress plugin through 2.0.4 does not sanitise or escape its "Paypal email address" setting before outputting it in the page, leading to an authenticated Stored Cross-Site Scripting issue

Affected products

• Bookshelf Project Bookshelf: up to and including 2.0.4

Published 2021-08-02. Last modified 2026-06-17.