User Registration <= 3.0.2 - Authenticated (Subscriber+) Arbitrary File Upload
Strategic Overview
- Status
- Patched in 3.0.2.1
- Affected Version
<= 3.0.2- CVSS
- 9.9Critical
- Weakness type
- CWE-434 · Unrestricted Upload of File with Dangerous Type
- CVE
CVE-2023-3342
At a glance
CVE-2023-3342 is a critical-severity Unrestricted Upload of File with Dangerous Type vulnerability in the User Registration & Membership WordPress plugin, affecting versions <= 3.0.2. It carries a CVSS score of 9.9 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 3.0.2.1; sites on affected versions should update now. Disclosed July 2023, reported by István Márton.
Vulnerability Overview
The User Registration plugin for WordPress is vulnerable to arbitrary file uploads due to a hardcoded encryption key and missing file type validation on the 'ur_upload_profile_pic' function in versions up to, and including, 3.0.2. This makes it possible for authenticated attackers with subscriber-level capabilities or above to upload arbitrary files on the affected site's server which may make remote code execution possible. This was partially patched in version 3.0.2 and fully patched in version 3.0.2.1.
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 interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.
CWE-434: Unrestricted Upload of File with Dangerous Type
User Registration & Membership <= 3.0.2 carries this weakness at ur_upload_profile_pic, and reaching it takes an account at Subscriber level or above. An unrestricted file upload lets a caller store a file whose type or destination the application does not properly constrain.
If an uploaded file lands anywhere the server will execute, the flaw becomes remote code execution and the site should be treated as fully compromised. For User Registration & Membership the fix is 3.0.2.1: builds <= 3.0.2 are affected, anything from 3.0.2.1 onward is not.
Remediation
Update to version 3.0.2.1, or a newer patched version
How does WordSec protect against this?
An attacker needs Subscriber access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: User Registration & Membership 3.0.2.1 closes this, and updating the plugin is the step that ends it.
- Firewall
- Scanner
- Alerts
External References
Related records
Other vulnerabilities in User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder
- 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 - 8.1CVE-2026-11961: User Registration & Membership Privilege Escalation
CVE-2026-11961 - 8.1CVE-2026-1779: User Registration & Membership Authentication Bypass
CVE-2026-1779 - 8.1CVE-2025-2594: User Registration & Membership Authentication Bypass
CVE-2025-2594
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