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

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.

Scores

EPSS (exploitation in 30 days)

0.20% · top 90% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.4.

Weakness

• CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)All about CWE-79 and its CVEs

Affected products

• getwpfunnels · WPFunnels – Funnel Builder for WooCommerce with Checkout & One Click Upsell

  • affected ≤ 3.7.9

References (2)

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

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-0626](https://trackcve.app/badge/CVE-2026-0626.svg)](https://trackcve.app/cve/CVE-2026-0626)

Record last updated 8 Apr 2026, 16:41 UTC.