Strategic Overview
- Status
- Patched in 3.8.2.3
- Affected Version
<= 3.8.2.2- CVSS
- 6.1Medium
- Weakness type
- CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')
- CVE
CVE-2023-0552
At a glance
CVE-2023-0552 is a medium-severity URL Redirection to Untrusted Site ('Open Redirect') vulnerability in the Pie Register WordPress plugin, affecting versions <= 3.8.2.2. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.8.2.3; sites on affected versions should update now. Disclosed February 2023, reported by Omar Amin.
Vulnerability Overview
The Pie Register plugin for WordPress is vulnerable to Open Redirect via the 'redirect_to' parameter in versions up to, and including, 3.8.2.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to redirect users to an external site, if they can successfully trick a user into performing an action such as clicking on a link.
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.
CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
Pie Register <= 3.8.2.2 carries this weakness at redirect_to, and reaching it takes a caller who can reach the endpoint. An open redirect is a page that takes a destination from the request and sends the browser there without checking that the destination belongs to the site.
A link that starts on a trusted domain finishes on an attacker's, which is what makes phishing and consent-screen abuse credible to the person clicking it. For Pie Register the fix is 3.8.2.3: builds <= 3.8.2.2 are affected, anything from 3.8.2.3 onward is not.
Remediation
Update to version 3.8.2.3, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Pie Register: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Pie Register 3.8.2.3 closes this, and updating the plugin is the step that ends it.
- Firewall
- 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
- 8.8CVE-2024-6069: Pie Register - Basic Authenticated (Subscriber+)
CVE-2024-6069
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