WPC Product Bundles for WooCommerce <= 8.6.6 - Unauthenticated Stored Cross-Site Scripting via 'qty' Parameter
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-93836
- 2026-10-03 Alias added: GHSA-m435-6crg-xq92
References
Other 6
- https://www.wordfence.com/threat-intel/vulnerabilities/id/fc620054-00ed-4c2e-9448-b40ae28efff3?source=cve
- 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#L584
- https://plugins.trac.wordpress.org/browser/woo-product-bundle/tags/8.6.5/includes/class-woosb.php#L579
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3702892%40woo-product-bundle&new=3702892%40woo-product-bundle
More wpclever vulnerabilities
- TI-2024-33849 WordPress WPC Shop as a Customer for WooCommerce plugin <= 1.2.6 - PHP Object Injection vulnerability CVSS 3.1HIGH 8.8
- TI-2025-22095 WordPress WPC Smart Linked Products plugin <= 1.3.5 - Privilege Escalation vulnerability CVSS 3.1HIGH 8.8
- TI-2025-22042 Missing authorization in wpclever WPC Smart Upsell Funnel for WooCommerce CVSS 3.1HIGH 8.8
- TI-2024-09664 WPC Smart Messages for WooCommerce <= 4.2.1 - Authenticated (Subscriber+) Local File Inclusion CVSS 3.1HIGH 8.8
- TI-2026-63681 Improper privilege management in wpclever WPC Shop as a Customer for WooCommerce CVSS 3.1HIGH 8.8
- TI-2025-03002 WPC Admin Columns 2.0.6 - 2.1.0 - Authenticated (Subscriber+) Privilege Escalation via User Meta Update CVSS 3.1HIGH 8.8
Sources
- CVE-2026-93836 · CVE Program
- CVE-2026-93836 · NVD
- FIRST EPSS
- GHSA-m435-6crg-xq92 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences