CVE-2026-93836

high

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.

References

https://www.wordfence.com/threat-intel/vulnerabilities/id/fc620054-00ed-4c2e-9448-b40ae28efff3?source=cve

https://plugins.trac.wordpress.org/changeset?reponame=&old=3702892%40woo-product-bundle&new=3702892%40woo-product-bundle

https://plugins.trac.wordpress.org/browser/woo-product-bundle/tags/8.6.5/includes/class-woosb.php#L584

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#L1197

https://plugins.trac.wordpress.org/browser/woo-product-bundle/tags/8.6.5/includes/class-backend.php#L1949

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-84310

Details

Source: Mitre, NVD

Published: 2026-09-22

Updated: 2026-09-22

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 7.2

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

Severity: High

EPSS

EPSS: 0.0023