Description
The WPFunnels – Funnel Builder for WooCommerce with Checkout & One Click Upsell plugin for WordPress is vulnerable to Privilege Escalation via arbitrary option update in all versions up to, and including, 3.12.8. This is due to the `update_settings()` REST callback failing to validate the `group_id` path parameter against an allowlist of permitted option names before passing it directly to `get_option()` and `update_option()`, allowing the built-in `wp_user_roles` option — which satisfies the route's loose `[\w-]+` regex — to be targeted. This makes it possible for authenticated attackers with the `wpf_manage_funnels` capability and above to elevate their privileges to administrator by writing a crafted role definition containing arbitrary capabilities into the `wp_user_roles` option, thereby granting any WordPress role full site administrator access. The `wpf_manage_funnels` capability is typically assigned to the Funnel Manager custom role created by the plugin, meaning this role is the minimum required to exploit the vulnerability.
References6
- plugins.trac.wordpress.org/browser/wpfunnels/tags/3.12.8/includ…
- plugins.trac.wordpress.org/browser/wpfunnels/tags/3.12.8/includ…
- plugins.trac.wordpress.org/browser/wpfunnels/tags/3.12.8/includ…
- plugins.trac.wordpress.org/browser/wpfunnels/tags/3.12.8/includ…
- plugins.trac.wordpress.org/changeset?reponame=&old=3607181%40wp…
- www.wordfence.com/threat-intel/vulnerabilities/id/76ad6d21-f277…
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 47 · as of 15 November 2026
- CWE
- CWE-269
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