CVE-2026-81431: Registration Form for WooCommerce 1.1.0 - 1.1.2 - Contributor+ Privilege Escalation via Unvalidated tgwcfb_id
The Registration Form for WooCommerce WordPress plugin before 1.1.3 does not validate that the form referenced during registration is a legitimate registration form, reading the permitted-role allow-list from an arbitrary attacker-controlled post instead. A user able to create a post (Contributor and above) can therefore register a new account with an arbitrary role, including Administrator, leading to full site takeover. This is an incomplete fix of CVE-2026-54807.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
WooCommerce WordPress pluginto a version that resolves this vulnerability.Fixed in 1.1.3Patch CVE-2026-54807
Event History
Frequently Asked Questions
Who can exploit this issue?
An authenticated WordPress user who can create a post can exploit it. This includes users with the Contributor role and higher privileges.
What access does an attacker gain after successful exploitation?
The attacker can register a new account with an arbitrary role, including Administrator. An Administrator account can lead to full site takeover.
Which plugin versions are affected?
Versions before 1.1.3 are affected. The issue is described for versions 1.1.0 through 1.1.2.