Pie Register – User Registration, Profiles & Content Restriction <= 3.8.4.8 - Missing Authorization to Unauthenticated Registration Form Status Modification
Strategic Overview
- Status
- Patched in 3.8.4.9
- Affected Version
<= 3.8.4.8- CVSS
- 6.5Medium
- Weakness type
- CWE-862 · Missing Authorization
- CVE
CVE-2026-3571
At a glance
CVE-2026-3571 is a medium-severity Missing Authorization vulnerability in the Pie Register WordPress plugin, affecting versions <= 3.8.4.8. It carries a CVSS score of 6.5 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.8.4.9; sites on affected versions should update now. Disclosed April 2026, reported by Youssef Elouaer.
Vulnerability Overview
The Pie Register – User Registration, Profiles & Content Restriction plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the pie_main() function in all versions up to, and including, 3.8.4.8. This makes it possible for unauthenticated attackers to change registration form status.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.
CWE-862: Missing Authorization
Pie Register <= 3.8.4.8 carries this weakness at pie_main(), and reaching it takes no account at all. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.
Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Pie Register the fix is 3.8.4.9: builds <= 3.8.4.8 are affected, anything from 3.8.4.9 onward is not.
Remediation
Update to version 3.8.4.9, or a newer patched version
How does WordSec protect against this?
This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: Pie Register 3.8.4.9 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in Pie Register – User Registration, Profiles & Content Restriction
- 9.8CVE-2024-27957: Pie Register <= 3.8.3.2 Arbitrary File Upload
CVE-2024-27957 - 9.8CVE-2025-34077: Pie Register <= 3.7.1.4 Authentication Bypass
CVE-2025-34077 - 9.8CVE-2021-24731: Pie Register <= 3.7.1.5 SQL Injection
CVE-2021-24731 - 9.8CVE-2019-15659: Pie Register SQL Injection
CVE-2019-15659 - 9.8CVE-2018-10969: Pie Register <= 3.0.9 SQL Injection
CVE-2018-10969 - 9.8Registration Forms Authentication Bypass
- 9.8Pie Register 2.0.14-2.0.15 SQL Injection
- 8.1CVE-2021-24647: Pie Register <= 3.7.1.5 Authentication Bypass
CVE-2021-24647
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C