User Registration Bypass in TutorStarter WordPress Theme by TutorStar
CVE-2026-104671

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Tutorstarter
Vendor
CVE Published:
8 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-104671?

The TutorStarter WordPress theme prior to version 4.0.4 contains a vulnerability where one of its AJAX registration handlers fails to respect the site's user registration setting. This weakness enables unauthenticated visitors to create user accounts on the WordPress site even when user registration is disabled, posing a significant security risk.

Affected Version(s)

TutorStarter 0 < 4.0.4

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-2026-104671 - Proof of Concept

References

https://wpscan.com/vulnerability/6ecea67e-8019-4ef2-bd27-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Alexander Jurkschat
WPScan
.