WordPress Admin Plugin Privilege Escalation via Form Injection

The Frontend Admin by DynamiApps plugin for WordPress is vulnerable to unauthenticated privilege escalation in versions up to and including 3.29.2. This is due to insecure form submission handling that accepts arbitrary form definitions from user input instead of securely loading them from the backend. When $_POST['_acf_form'] is an array (rather than a form ID), the validate_form() function bypasses database lookup and directly processes the attacker-controlled structure. The create_record() function preserves attacker-supplied record data if present, and the user action's run() function falls back to attacker-controlled field definitions from $form['fields'] when legitimate fields cannot be found. The role field's pre_update_value() validation reads $field['role_options'] from this attacker-controlled definition, allowing an attacker to specify ['administrator'] as an allowed role and bypass the security check. This makes it possible for unauthenticated attackers to create administra

Casky was already ahead

This CVE exploits attack patterns that Casky's 203matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

The Frontend Admin by DynamiApps plugin for WordPress contains a critical privilege escalation vulnerability affecting versions up to 3.29.2. By exploiting insecure form submission handling, unauthenticated attackers can inject arbitrary form definitions through the $_POST['_acf_form'] parameter, bypassing intended database validation checks. When the plugin's validate_form() function receives an array instead of a form ID, it processes the attacker-controlled structure directly without backend verification, allowing privilege escalation and unauthorized record creation. This vulnerability affects WordPress administrators and website owners using this plugin, potentially exposing sensitive data and enabling complete site compromise without requiring valid credentials.

Casky's 203 mapped security skills detect this vulnerability pattern by analyzing privilege escalation attack chains (MITRE ATT&CK TA0004). Claude AI's extended reasoning identifies the core weakness: missing input validation on form definitions combined with insecure direct object references. Practitioners using Casky would observe detection of improper input handling in form submission workflows, missing backend authorization checks before processing user-supplied structures, and the ability to escalate privileges without authentication. The platform flags the gap between client-side form submission and backend validation logic—specifically where $_POST data bypasses database lookup entirely. Security teams gain visibility into how attackers chain unsanitized input acceptance with direct function execution, enabling them to prioritize patching and implement server-side form definition validation controls to prevent similar vulnerabilities.

Live Threat IntelligenceComing soon

Casky Risk Score

—

EPSS Probability

—

Shodan Exposure

—

GreyNoise Signal

—

Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

203 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-6226.

analyzing-cloud-storage-access-patterns

cloud security · low

Run

analyzing-kubernetes-audit-logs

container security · low

Run

analyzing-office365-audit-logs-for-compromise

cloud security · low

Run

MITRE ATT&CK Techniques

TA0004

Investigate the attack patterns behind CVE-2026-6226

Casky has 203 skills that investigate the attack patterns behind CVE-2026-6226. Run one and get CVSS-scored findings in 3 minutes.

Run the skill that detects this →

X Instagram LinkedIn