WordPress Forminator Plugin Stored XSS in Rich-Text Fields

The Forminator Forms – Contact Form, Payment Form & Custom Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Rich-Text Textarea Field in all versions up to, and including, 1.57.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Successful exploitation requires an administrator to open the stored submission entry in the Forminator Entries view and interact with the planted link, at which point WordPress core's jQuery-based click handler on `.contextual-help-tabs a` evaluates the entity-decoded href as HTML, firing the attacker's payload in the administrator's authenticated wp-admin session.

Casky was already ahead

This CVE exploits attack patterns that Casky's 323matched 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

Forminator, a widely-used WordPress form builder plugin with thousands of installations, contains a stored cross-site scripting (XSS) vulnerability in its rich-text textarea field functionality. The vulnerability stems from insufficient input sanitization and output escaping, allowing unauthenticated attackers to inject malicious JavaScript that persists in the database. When administrators or users access pages containing the injected form submissions, the arbitrary scripts execute in their browsers with full session privileges. This creates a critical supply-chain risk: attackers can compromise admin accounts, steal sensitive data, modify website content, or pivot to other systems—all without requiring direct authentication.

Casky's 323 matched security skills leverage Claude's extended reasoning to detect the attack patterns behind this vulnerability across MITRE ATT&CK techniques TA0001 (Initial Access) and TA0043 (Reconnaissance). Practitioners using Casky will identify suspicious form submission payloads containing script tags, event handlers, and JavaScript obfuscation patterns that bypass weak sanitization filters. The platform correlates stored XSS indicators—such as unescaped HTML in database queries, missing Content Security Policy headers, and form field inputs lacking proper output encoding—with documented exploitation chains. When findings surface, security teams see precise mapping to vulnerable code patterns, affected Forminator versions up to 1.57.2, and remediation paths including immediate plugin updates and input validation hardening, enabling rapid response before administrator interaction triggers payload execution.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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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 →

323 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-85235.

Abuse of Public-Facing API: Mobile API Abuse

mobile security · low

Run

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

MITRE ATT&CK Techniques

TA0001 TA0043

Investigate the attack patterns behind CVE-2026-85235

Casky has 323 skills that investigate the attack patterns behind CVE-2026-85235. Run one and get CVSS-scored findings in 3 minutes.

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