CVE-2026-84281
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 'productTitle' in '_fpd_data' Order Item Meta 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. The fpd_save_order AJAX action is registered for unauthenticated users via wp_ajax_nopriv_fpd_save_order with no nonce or capability check, and the strip_tags() sanitization applied at save time is bypassed by submitting JSON unicode escape sequences (e.g. \u003c, \u003e), which json_decode() silently converts back to literal angle brackets when the order is rendered in the admin view.

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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-2026-84281
EUVD
EUVD-2026-86536

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.

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Executive Summary

The Fancy Product Designer WordPress plugin up to version 6.5.2 has a stored Cross-Site Scripting (XSS) vulnerability. Attackers can inject malicious scripts via the productTitle field in order data. The plugin fails to properly sanitize input and lacks proper output escaping, allowing unauthenticated users to store scripts that execute when other users view affected pages.

Detection Guidance

Check for suspicious entries in WordPress admin views or order data containing unusual scripts. Inspect the _fpd_data meta field in database tables for productTitle values with HTML or JavaScript content. Look for AJAX requests to wp_ajax_nopriv_fpd_save_order without proper nonce validation.

Impact Analysis

This vulnerability allows attackers to steal user sessions, redirect users to malicious sites, or perform actions on their behalf. It could lead to data theft, account compromise, or defacement of websites using the plugin. The impact is significant because it requires no authentication and affects all users accessing injected pages.

Compliance Impact

This vulnerability could lead to unauthorized access to personal data, violating GDPR and HIPAA requirements for data protection. It may result in data breaches, triggering mandatory breach notifications and potential fines under these regulations.

Mitigation Strategies

Update the Fancy Product Designer plugin to the latest version beyond 6.5.2. If an update is unavailable, disable the plugin immediately. Review all orders for injected scripts and remove any malicious content. Implement strict input validation for productTitle fields.

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