Atomicorp WAF Rule 300021

Rule Summary

• Rule ID: 300021
• Status: Active
• Alert message: Atomicorp.com WAF Rules - Virtual Just In Time Patch: Everest Forms Pro CVE-2026-3300 PHP Code Injection blocked
• Observed CWEs: CWE-94 (1)
• Revision: 2
• 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: Everest Forms Pro CVE-2026-3300 PHP Code Injection blocked” 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-2026-3300

The Everest Forms Pro plugin for WordPress is vulnerable to Remote Code Execution via PHP Code Injection in all versions up to, and including, 1.9.12. This is due to the Calculation Addon’s process_filter() function concatenating user-submitted form field values into a PHP code string without proper escaping before passing it to eval(). The sanitize_text_field() function applied to input does not escape single quotes or other PHP code context characters. This makes it possible for unauthenticated attackers to inject and execute arbitrary PHP code on the server by submitting a crafted value in any string-type form field (text, email, URL, select, radio) when a form uses the “Complex Calculation” feature.

• Association: The rule references CVE-2026-3300 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.