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CVE-2026-0626: WPFunnels <= 3.7.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'wpf_optin_form' Shortcode

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-04 · updated 2026-07-24
• Weakness: CWE-79

Description

The WPFunnels – Easy Funnel Builder To Optimize Buyer Journeys And Get More Leads & Sales plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'wpf_optin_form' shortcode in all versions up to, and including, 3.7.9 due to insufficient input sanitization and output escaping of the 'button_icon' parameter. 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

• getwpfunnels WPFunnels – Funnel Builder for WooCommerce with Checkout & One Click Upsell: through 3.7.9

References

• https://plugins.trac.wordpress.org/changeset/3439366/wpfunnels/trunk/includes/core/shortcodes/templates/optin/form.php
• https://www.wordfence.com/threat-intel/vulnerabilities/id/2130847a-b6c5-412e-8d90-ba42d3fb21f6?source=cve

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