Custom User Registration Fields for WooCommerce <= 2.2.3 - Unauthenticated Privilege Escalation via 'afreg_select_user_role' Parameter in Store API Checkout
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | Custom User Registration Fields for WooCommerce | <= 2.2.3 | 2.2.4 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-269- Platform
- WordPress
- Package
Custom User Registration Fields for WooCommerce- Disclosed
- 29.08.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
Wordfence Intelligence - 715723e7-5820-4a64-848f-f89b5b73a681 - Wordfence Intelligence
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Copyright 2012-2026 Defiant Inc.
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Vulnerability history: Custom User Registration Fields for WooCommerce
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 07.2025 08.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
Disclosures per year
- 2025: 1
- 2026: 1
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Custom User Registration Fields for WooCommerce <= 2.2.3 - Unauthenticated Privilege Escalation via 'afreg_select_user_role' Parameter in Store API Checkout this entry
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