CVE-2026-96666
Received Received - Intake

Stored XSS in Schema App Structured Data WordPress Plugin

Publication date: 2026-10-29

Last updated on: 2026-10-29

Assigner: Wordfence

Description
The Schema App Structured Data plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content via 'Remove Microdata' Output Filter in all versions up to, and including, 2.3.2 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 that an administrator has enabled the plugin's 'Remove Microdata' option and approves the malicious comment.

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Meta Information

Published
2026-10-29
Last Modified
2026-10-29
Generated
2026-10-29
AI Q&A
2026-10-29
EPSS Evaluated
N/A
NVD
CVE-2026-96666
EUVD
EUVD-2026-112589

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
vberkel Schema App Structured Data 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

The Schema App Structured Data plugin for WordPress has a stored cross-site scripting (XSS) vulnerability due to insufficient input sanitization and output escaping in the 'Remove Microdata' output filter. This allows unauthenticated attackers to inject malicious scripts into web pages via comment content. Exploitation requires an administrator to enable the 'Remove Microdata' option and approve the malicious comment.

Detection Guidance

Check for the Schema App Structured Data plugin in WordPress installations up to version 2.3.2. Look for malicious scripts in comment content if the 'Remove Microdata' option is enabled. Review server logs for unusual script injections in pages.

Impact Analysis

This vulnerability allows attackers to inject arbitrary scripts into pages viewed by users. If exploited, it could lead to unauthorized actions on behalf of users, theft of sensitive data, or defacement of web pages. Users accessing infected pages may have their sessions compromised.

Compliance Impact

This vulnerability could lead to data breaches, exposing personal or sensitive information. Under GDPR, this may result in fines for failing to protect user data. For HIPAA, it could compromise protected health information, leading to regulatory penalties and loss of trust.

Mitigation Strategies

Update the Schema App Structured Data plugin to the latest version. Disable the 'Remove Microdata' option if enabled. Remove any malicious comments approved by administrators. Monitor for further unauthorized script injections.

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