CVE-2024-6311: Funnelforms Free <= 3.7.3.2 - Authenticated (Administrator+) Arbitrary File Upload

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-08-28 · updated 2026-06-17
Weakness: CWE-434

Description

The Funnelforms Free plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'af2_add_font' function in all versions up to, and including, 3.7.3.2. This makes it possible for authenticated attackers, with administrator-level and above permissions, to upload arbitrary files on the affected site's server which may make remote code execution possible.

Affected products

Funnelforms Free: through 3.7.3.2

References

https://plugins.trac.wordpress.org/browser/funnelforms-free/tags/3.7.3.2/admin/menu_ajax_functions/formularbuilder_fonts.php#L47
https://plugins.trac.wordpress.org/browser/funnelforms-free/tags/3.7.4.1/admin/menu_ajax_functions/formularbuilder_fonts.php?rev=3141470#L50
https://www.wordfence.com/threat-intel/vulnerabilities/id/cbd42fc4-ab4a-4053-b765-18272eacd2bc?source=cve

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