WordPress Form Plugin Stores Malicious Scripts in User Pages

The HT Contact Form – Drag & Drop Form Builder for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'file_upload' parameter in all versions up to, and including, 2.8.2 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. Exploitation requires the 'Store Submissions' setting to be enabled, as this controls whether unsanitized field values are persisted to the database and subsequently rendered via dangerouslySetInnerHTML in the admin entry viewer.

Casky was already ahead

This CVE exploits attack patterns that Casky's 301matched 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 HT Contact Form plugin for WordPress contains a stored cross-site scripting (XSS) vulnerability in its file upload functionality that allows unauthenticated attackers to inject arbitrary JavaScript into web pages. When the 'Store Submissions' feature is enabled, unsanitized input from the 'file_upload' parameter persists in the database and executes in the browsers of all users who view affected pages. This vulnerability affects all versions through 2.8.2 and poses significant risk to WordPress sites collecting form submissions, as attackers can steal session cookies, capture credentials, deface content, or redirect users to malicious sites without any authentication requirements.

Casky's 301 matching security skills leverage Claude's extended reasoning to detect the attack patterns underlying this vulnerability across MITRE ATT&CK techniques TA0001 (Reconnaissance) and TA0043 (Reconnaissance via Resource Development). Practitioners using Casky would identify detection patterns including: unsanitized user input flowing into database storage (CWE-79 indicators), suspicious JavaScript payloads in form submissions, database queries containing script tags or event handlers, and anomalous page rendering with injected code execution. The platform's skill mapping would highlight gaps in input validation controls and insufficient output encoding at the presentation layer, enabling security teams to correlate these technical indicators with the broader attack chain and implement compensating controls like content security policies or Web Application Firewalls while patches are deployed.

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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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301 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-7052.

analyzing-apt-group-with-mitre-navigator

threat intelligence · low

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analyzing-campaign-attribution-evidence

threat intelligence · low

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analyzing-certificate-transparency-for-phishing

threat intelligence · low

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MITRE ATT&CK Techniques

TA0001 TA0043

Investigate the attack patterns behind CVE-2026-7052

Casky has 301 skills that investigate the attack patterns behind CVE-2026-7052. Run one and get CVSS-scored findings in 3 minutes.

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