CVE-2024-3730: Simple-Membership-Plugin Simple Membership

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The Simple Membership plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'swpm_paypal_subscription_cancel_link' shortcode in all versions up to, and including, 4.4.3 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

• Simple-Membership-Plugin Simple Membership: before 4.4.4 (fixed in 4.4.4)

Published 2024-04-25. Last modified 2026-06-17.