User Authentication Flaw in User Registration & Membership Plugin by WordPress
CVE-2025-2594

8.1HIGH

Key Information:

Vendor
WordPress
Status
User Registration & Membership
Vendor
CVE Published:
22 April 2025

Badges

👾 Exploit Exists🟡 Public PoC

Summary

The User Registration & Membership Plugin for WordPress, prior to version 4.1.3, suffers from a data validation flaw in an AJAX action, particularly when the Membership Addon is enabled. This vulnerability allows an attacker to authenticate as any user—including administrators—by exploiting the target account's user ID. Proper validation mechanisms are absent, leading to significant security risks for WordPress sites utilizing this plugin.

Affected Version(s)

User Registration & Membership 0 < 4.1.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-2594 - Proof of Concept

References

https://wpscan.com/vulnerability/1c1be47a-d5c0-4ac1-b9fd-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • đź‘ľ

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

wesley (wcraft)
WPScan
.