Atomicorp WAF Rule 300020

Rule Summary

• Rule ID: 300020
• Status: Active
• Alert message: Atomicorp.com WAF Rules - Virtual Just In Time Patch: User Registration & Membership <= 5.1.2 Unauthenticated Privilege Escalation blocked CVE-2026-1492
• Observed CWEs: CWE-269 (1)
• Revision: 1
• Rule severity: Alert (1)
• Phase: 2 (request body)
• Request surfaces: Request URI
• Rule action: deny
• HTTP status: 403
• Logging: log, auditlog

Description

This rule detects behavior identified by its current alert as “Virtual Just In Time Patch: User Registration & Membership <= 5.1.2 Unauthenticated Privilege Escalation blocked CVE-2026-1492” in the request URI. It evaluates during the request body phase and denies matching traffic with HTTP status 403.

CVEs Referenced by This Rule

The current ModSecurity rule metadata explicitly names the following CVEs. These references explain the rule author’s association; they do not claim that the rule is limited to these vulnerabilities or that this is an exhaustive coverage list.

CVE-2026-1492

The User Registration & Membership – Custom Registration Form Builder, Custom Login Form, User Profile, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to improper privilege management in all versions up to, and including, 5.1.2. This is due to the plugin accepting a user-supplied role during membership registration without properly enforcing a server-side allowlist. This makes it possible for unauthenticated attackers to create administrator accounts by supplying a role value during membership registration.

• Association: The rule references CVE-2026-1492 in its alert message.
• CVE Record (opens in a new tab)
• NVD (opens in a new tab)

Selected Related CVEs

This is a selected list of documented research observations, not an exhaustive coverage matrix. Absence of a CVE does not imply absence of protection.

Observed CWEs

These CWEs are recorded on published CVEs in the selected observations associated with this rule. They are observational relationships, not a claim that the rule universally blocks every vulnerability assigned to a CWE.