WordPress security changelog
HIGH CVE-2026-15103 Deferred

WPFunnels – Funnel Builder for WooCommerce with Checkout & One Click Upsell: Privilege escalation or authentication bypass

WPFunnels – Funnel Builder for WooCommerce with Checkout & One Click Upsell is affected by privilege escalation or authentication bypass. Exploitation requires an authenticated WordPress account. A successful request can grant permissions or access that the caller should not possess. The published affected range is <= 3.12.8.

CVE / CNA score 8.8 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
WPFunnels – Funnel Builder for WooCommerce with Checkout & One Click Upsell
Plugin slug
wpfunnels
Affected
<= 3.12.8
Safe version
> 3.12.8
Published
Jul 16, 2026
Weakness
CWE-269 — Improper Privilege Management

This CVE was published Jul 16, 2026 and is one of 10 known issues for this plugin.

What to do

Update, patch or deactivate.

Update WPFunnels – Funnel Builder for WooCommerce with Checkout & One Click Upsell to a release after 3.12.8, or disable and remove it until a fixed version is available.

A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical 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.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Primary and upstream sources