User Registration & Membership <= 4.1.2 - Authentication Bypass
Strategic Overview
- Status
- Patched in 4.1.3
- Affected Version
<= 4.1.2- CVSS
- 8.1High
- Weakness type
- CWE-288 · Authentication Bypass Using an Alternate Path or Channel
- CVE
CVE-2025-2594
At a glance
CVE-2025-2594 is a high-severity Authentication Bypass Using an Alternate Path or Channel vulnerability in the User Registration & Membership WordPress plugin, affecting versions <= 4.1.2. It carries a CVSS score of 8.1 (reachable over the network; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 4.1.3; sites on affected versions should update now. Disclosed April 2025, reported by wesley (wcraft).
Vulnerability Overview
The User Registration & Membership plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 4.1.2. This is due to incorrect authentication in the 'confirm_payment()' function. This makes it possible for unauthenticated attackers to log in an existing user on the site, even an administrator.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.
CWE-288: Authentication Bypass Using an Alternate Path or Channel
User Registration & Membership <= 4.1.2 carries this weakness at confirm_payment(), and reaching it takes a caller who can reach the endpoint. Authentication bypass through an alternate path means the application has a second route to a protected action that skips the checks the primary route performs.
The protection on the main path becomes irrelevant, because the attacker simply uses the route that never asks. For User Registration & Membership the fix is 4.1.3: builds <= 4.1.2 are affected, anything from 4.1.3 onward is not.
Remediation
Update to version 4.1.3, or a newer patched version
How does WordSec protect against this?
Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: User Registration & Membership 4.1.3 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 User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder
- 9.9CVE-2023-3342: User Registration <= 3.0.2 Arbitrary File Upload
CVE-2023-3342 - 9.8CVE-2026-32488: User Registration & Membership RCE
CVE-2026-32488 - 9.8CVE-2026-1492: User Registration & Membership Privilege Escalation
CVE-2026-1492 - 9.8CVE-2025-2563: User Registration & Membership Privilege Escalation
CVE-2025-2563 - 8.8CVE-2024-2417: User Registration Authenticated (Subscriber+)
CVE-2024-2417 - 8.8CVE-2023-3343: User Registration <= 3.0.1 PHP Object Injection
CVE-2023-3343 - 8.8CVE-2022-3912: User Registration <= 2.2.4 Arbitrary File Upload
CVE-2022-3912 - 8.1CVE-2026-11961: User Registration & Membership Privilege Escalation
CVE-2026-11961
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