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Vulnerability record · CVE-2026-93836 · published 22 September 2026

CVE-2026-93836: Cross-site scripting vulnerability

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.

7.2 CVSS 3.1 High EPSS 0.40% · top 68.5% CWE-79 · Cross-site scripting Deferred
7.2CVSS 3.1 base score
0.40%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
6References
22 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References

LinkTags
https://plugins.trac.wordpress.org/browser/woo-product-bundle/tags/8.6.5/includes/class-backend.php#L1949
https://plugins.trac.wordpress.org/browser/woo-product-bundle/tags/8.6.5/includes/class-woosb.php#L1197
https://plugins.trac.wordpress.org/browser/woo-product-bundle/tags/8.6.5/includes/class-woosb.php#L579
https://plugins.trac.wordpress.org/browser/woo-product-bundle/tags/8.6.5/includes/class-woosb.php#L584
https://plugins.trac.wordpress.org/changeset?reponame=&old=3702892%40woo-product-bundle&new=3702892%40woo-product-bundle
https://www.wordfence.com/threat-intel/vulnerabilities/id/fc620054-00ed-4c2e-9448-b40ae28efff3?source=cve

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Source: NIST National Vulnerability Database (record CVE-2026-93836), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.