WPFunnels Plugin up to 3.12.8 on WordPress REST callback update_settings group_id incorrect regex

Summaryinfo

A vulnerability has been found in WPFunnels Plugin up to 3.12.8 and classified as critical. This impacts the function update_settings of the component REST callback. The manipulation of the argument group_id leads to incorrect regex. This vulnerability is uniquely identified as CVE-2026-15103. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in WPFunnels Plugin up to 3.12.8. This issue affects the function update_settings of the component REST callback. The manipulation of the argument group_id with an unknown input leads to a incorrect regex vulnerability. Using CWE to declare the problem leads to CWE-185. The product specifies a regular expression in a way that causes data to be improperly matched or compared. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at wordfence.com. The identification of this vulnerability is CVE-2026-15103 since 07/08/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/16/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Name

• WPFunnels Plugin

Version

• 3.12.0
• 3.12.1
• 3.12.2
• 3.12.3
• 3.12.4
• 3.12.5
• 3.12.6
• 3.12.7
• 3.12.8

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CPE 2.2info

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