CVE-2026-3617: Swergroup PayPal Shortcodes

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

The Paypal Shortcode plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'amount' and 'name' shortcode attributes in all versions up to, and including, 0.3. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes. The swer_paypal_shortcode() function extracts shortcode attributes using extract() and shortcode_atts() at line 89, then directly concatenates the $name and $amount values into HTML input element value attributes at lines 105-106 without applying esc_attr() or any other escaping function. 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

• Swergroup PayPal Shortcodes: up to and including 0.3

Published 2026-03-21. Last modified 2026-06-17.