WordPress Plugin Allows Unauthenticated Arbitrary File Upload

The Schema & Structured Data for WP & AMP WordPress plugin before 1.60 does not check user capabilities on its frontend AJAX file-upload handlers and does not validate the actual content of uploaded files against the endpoint's intended media type, allowing unauthenticated users to upload any file type accepted by WordPress's media library through endpoints that should only accept images or videos.

Casky was already ahead

This CVE exploits attack patterns that Casky's 419matched 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 Schema & Structured Data for WP & AMP WordPress plugin before version 1.60 contains a critical file upload vulnerability that bypasses authentication and content validation controls. The plugin's AJAX file-upload handlers fail to verify user capabilities, allowing unauthenticated attackers to upload arbitrary file types through endpoints designed to accept only images or videos. This affects any WordPress installation running the vulnerable plugin version, potentially exposing thousands of sites to remote code execution if malicious files (PHP scripts, etc.) are uploaded and executed by the web server.

Casky's 419 matched security skills leverage Claude AI's extended reasoning to detect the attack chain across MITRE ATT&CK's initial access (TA0001), resource development (TA0043), and execution (TA0002) phases. Practitioners using Casky would identify suspicious AJAX requests to the plugin's upload endpoints lacking proper authentication headers, followed by file write operations with unexpected MIME types or executable extensions. The platform's skills would flag the absence of capability checks and content validation as CWE-434 violations, correlating these findings with known exploitation patterns—allowing teams to detect compromise attempts before malicious payloads execute on their infrastructure.

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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 →

419 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-9067.

analyzing-android-malware-with-apktool

malware analysis · medium

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analyzing-apt-group-with-mitre-navigator

threat intelligence · low

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analyzing-bootkit-and-rootkit-samples

malware analysis · medium

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MITRE ATT&CK Techniques

TA0001 TA0043 TA0002

Investigate the attack patterns behind CVE-2026-9067

Casky has 419 skills that investigate the attack patterns behind CVE-2026-9067. Run one and get CVSS-scored findings in 3 minutes.

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