CVE-2026-93836 WPC Product Bundles for WooCommerce <= 8.6.6 - Unauthenticated Stored Cross-Site Scripting via 'qty' Parameter
Unauthenticated attackers can inject arbitrary scripts via the qty parameter, leading to stored XSS execution when users view affected pages.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-93836?
CVE-2026-93836 is a high-severity cross-site scripting vulnerability in wpclever WPC Product Bundles for WooCommerce, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-93836?
How do I fix CVE-2026-93836?
No fix has been published for CVE-2026-93836 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-93836 being exploited?
There is no known exploitation of CVE-2026-93836 in the wild and no public exploit code.
Sources
Also known as GHSA-m435-6crg-xq92.