CVE-2026-84279
Received Received - Intake

Stored XSS in Fancy Product Designer WordPress Plugin

Publication date: 2026-09-25

Last updated on: 2026-09-25

Assigner: Wordfence

Description
The Fancy Product Designer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'output_format' parameter in all versions up to, and including, 6.5.2 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. This requires the Pro Export/Genius feature to be enabled on the site, as the vulnerable fpd_pr_export AJAX action is only registered when that feature is active.

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Meta Information

Published
2026-09-25
Last Modified
2026-09-25
Generated
2026-09-25
AI Q&A
2026-09-25
EPSS Evaluated
N/A
NVD
CVE-2026-84279
EUVD
EUVD-2026-86538

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
fancy_product_designer fancy_product_designer to 6.5.2 (inc)

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.

Attack-Flow Graph

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Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) flaw in the Fancy Product Designer WordPress plugin up to version 6.5.2. It allows unauthenticated attackers to inject malicious scripts via the 'output_format' parameter due to poor input sanitization and output escaping. The attack requires the Pro Export/Genius feature to be enabled.

Detection Guidance

Check if the Fancy Product Designer plugin is installed and enabled on your WordPress site. Inspect the plugin version to confirm if it is up to and including 6.5.2. Look for suspicious scripts in pages where the Pro Export/Genius feature is active.

Impact Analysis

An attacker could inject scripts that execute when users access infected pages. This may lead to theft of cookies, session tokens, or other sensitive data. It could also allow redirection to malicious sites or defacement of the website.

Compliance Impact

This vulnerability could lead to unauthorized access to user data, violating GDPR's data protection requirements and HIPAA's safeguards for protected health information. Organizations may face fines or penalties for failing to protect user data.

Mitigation Strategies

Update the Fancy Product Designer plugin to the latest version beyond 6.5.2. If an update is unavailable, disable the plugin or the Pro Export/Genius feature immediately. Review and remove any unauthorized scripts from affected pages.

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