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TI-2026-86627 Aliases CVE-2026-124258GHSA-3pc2-387p-3f6h

Missing authorization in ThemeGrill User Registration plugin

Priority LOW 27CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

The ThemeGrill User Registration plugin for WordPress, from n/a through 5.3.1, has a missing authorization check (CWE-862). A remote attacker without privileges can reach functionality that should be restricted, which affects data integrity. The attack needs low complexity and no user interaction.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

Description from the CNA

Missing Authorization vulnerability in ThemeGrill User Registration user-registration allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects User Registration: from n/a through 5.3.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ThemeGrillUser Registrationup to 5.3.1—No fix listedCNA
  • User Registration VendorThemeGrill Affected up to 5.3.1 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for User Registration.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

Timeline

  1. 2026-11-07 Threatist record created from CVE-2026-124258
  2. 2026-11-07 CISA SSVC decision points changed
  3. 2026-11-07 Alias added: GHSA-3pc2-387p-3f6h

References

Other 1

  • TI-2024-16396 WordPress LMS by Masteriyo plugin <= 1.7.2 - Privilege Escalation vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2026-51986 WordPress Masteriyo - LMS plugin <= 2.3.2 - Arbitrary File Upload vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2026-39610 WordPress Registration Form for WooCommerce plugin <= 1.0.9 - Privilege Escalation vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2020-18616 themegrill-demo-importer before 1.6.2 does not require authentication for wiping the… CVSS 3.1CRITICAL 9.1
  • TI-2020-18972 ThemeGrill Demo Importer 1.3.4 - 1.6.1 - Authorization Bypass to Site Reset CVSS 3.1CRITICAL 9.9
  • TI-2026-36307 WordPress User Registration Stripe plugin <= 1.3.12 - Broken Access Control vulnerability CVSS 3.1HIGH 8.2
See all 43 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences