CVE-2026-93836 | defend.network

What is CVE-2026-93836?

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.

CVSS7.2 NVD 3.1

SeverityHIGH

ExploitationNo exploitation reported

EPSS<1% · P32

Triage statusNo Known Exploit

ActionPatch this week

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

CWECWE-79

NVD published2026-09-22

NVD last modified2026-09-22

Timeline

2026-09-22Published to the U.S. National Vulnerability Database (NVD)
2026-10-07First covered in a defend.network daily briefing

Affected product

See advisory

Remediation Steps

Apply the vendor security update for Ninja Forms (WordPress plugin) as a priority.
Restrict network exposure of the affected service to trusted sources until patched.
Review logs and detections for indicators of exploitation.
Confirm fixed versions against the official vendor advisory before deploying.

References

Referenced in our briefings & reports

Vulnerability Priority Report – Week 1 of October 2026 (October 5 – 11)
WordPress, Atlassian, ASOS breached; AI-powered phishing escalates (2026-10-07)

Browse all tracked CVEs in the defend.network CVE database →

🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.