Addify Custom User Registration Fields for WooCommerce Plugin /wc/store/v1/checkout af_reg_custom_order_processing_function privileges management

Summaryinfo

A vulnerability was found in Addify Custom User Registration Fields for WooCommerce Plugin up to 2.2.3. It has been classified as critical. The affected element is the function af_reg_custom_order_processing_function of the file /wc/store/v1/checkout. The manipulation of the argument afreg_select_user_role leads to privileges management. This vulnerability is listed as CVE-2026-15369. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Addify Custom User Registration Fields for WooCommerce Plugin up to 2.2.3. This issue affects the function af_reg_custom_order_processing_function of the file /wc/store/v1/checkout. The manipulation of the argument afreg_select_user_role with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The Custom User Registration Fields for WooCommerce plugin for WordPress is vulnerable to Privilege Escalation in versions up to, and including, 2.2.3. This is due to the plugin accepting an attacker-controlled afreg_select_user_role value from the unauthenticated WooCommerce Store API /wc/store/v1/checkout request in the af_reg_checkout_data_to_order_meta_data_block() function, persisting it in order meta, and then passing it directly to WP_User::add_role() in the af_reg_custom_order_processing_function() function (hooked to woocommerce_thankyou) without validating against the plugin's admin-configured allowed role list. This makes it possible for unauthenticated attackers to elevate their privileges to Administrator by creating an account during checkout with a modified JSON body specifying administrator (or any other role slug) as the desired role. Note: The exploit requires the "User Role Selection" setting to be enabled.

The advisory is shared at wordfence.com. The identification of this vulnerability is CVE-2026-15369 since 07/10/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/29/2026). MITRE ATT&CK project uses the attack technique T1068 for this issue.

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

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• Addify

Name

• Custom User Registration Fields for WooCommerce Plugin

Version

• 2.2.0
• 2.2.1
• 2.2.2
• 2.2.3

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion