CVE-2026-93836
Received Received - Intake

Stored XSS in WPC Product Bundles for WooCommerce

Publication date: 2026-09-22

Last updated on: 2026-09-22

Assigner: Wordfence

Description
The WPC Product Bundles for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'qty' parameter in all versions up to, and including, 8.6.6 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 float cast used during quantity validation allows a numeric-prefixed payload such as '1<img src=x onerror=...>' to pass validation while retaining its malicious HTML, which is then stored verbatim in order item metadata under the '_woosb_ids' key.

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Meta Information

Published
2026-09-22
Last Modified
2026-09-22
Generated
2026-09-22
AI Q&A
2026-09-22
EPSS Evaluated
N/A
NVD
CVE-2026-93836
EUVD
EUVD-2026-84310

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
woocommerce wpc_product_bundles to 8.6.6 (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

This vulnerability is a Stored Cross-Site Scripting (XSS) flaw in the WPC Product Bundles for WooCommerce plugin for WordPress. It exists in versions up to 8.6.6 due to insufficient input sanitization and output escaping in the 'qty' parameter. Attackers can inject malicious scripts that execute when users access infected pages. The issue arises because a numeric-prefixed payload like '1<img src=x onerror=...>' bypasses quantity validation and is stored in order metadata.

Detection Guidance

Check WordPress sites for the WPC Product Bundles for WooCommerce plugin versions up to 8.6.6. Inspect network traffic for suspicious input in the 'qty' parameter containing HTML or script tags. Review stored data under the '_woosb_ids' key in order item metadata for malicious payloads.

Impact Analysis

Unauthenticated attackers can inject malicious scripts into pages. When users visit these pages, the scripts execute, potentially stealing cookies, session tokens, or other sensitive data. Attackers could also perform actions on behalf of users, modify page content, or redirect users to malicious sites.

Compliance Impact

This vulnerability could lead to unauthorized access to user data, violating GDPR's data protection principles and HIPAA's security requirements. If exploited, it may result in data breaches, leading to legal penalties, reputational damage, and loss of user trust.

Mitigation Strategies

Update the WPC Product Bundles for WooCommerce plugin to the latest version. If an update is unavailable, disable the plugin immediately. Implement input validation and output escaping for the 'qty' parameter. Monitor for unauthorized script injections in stored data.

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