CVE-2026-4082: Erithq Er Swiffy Insert

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

The ER Swiffy Insert plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the [swiffy] shortcode in all versions up to and including 1.0.0. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes ('n', 'w', 'h'). These attributes are extracted using extract() and directly interpolated into the HTML output without any escaping such as esc_attr(). 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

• Erithq Er Swiffy Insert: up to and including 1.0.0

Published 2026-04-22. Last modified 2026-06-17.