# CVE-2026-93836 — wpclever WPC Product Bundles for WooCommerce

> As of 2026-09-22, CVE-2026-93836 is a HIGH-severity vulnerability in wpclever WPC Product Bundles for WooCommerce, CVSS v3.1 7.2, EPSS 0.2% (14.2th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-93836, most recently “Ninja Forms (CVE-2026-94504) and WPC Product Bundles (CVE-2026-93836) stored XSS flaws exploited to hijack WordPress sites”.

**Last updated:** 2026-09-22

## 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' to pass validation while retaining its malicious HTML, which is then stored verbatim in order item metadata under the '_woosb_ids' key.

The record classifies CVE-2026-93836 under weakness class [CWE-79](https://intel.threadlinqs.com/cwe/CWE-79). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 20 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.2 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 14.2% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-22

## Is CVE-2026-93836 being exploited?

It currently carries a trending score of 34 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **wpclever**: WPC Product Bundles for WooCommerce

## How to fix CVE-2026-93836

No vendor patch reference has been recorded for CVE-2026-93836 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-93836

1 tracked threat in the Threadlinqs corpus references CVE-2026-93836, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Ninja Forms (CVE-2026-94504) and WPC Product Bundles (CVE-2026-93836) stored XSS flaws exploited to hijack WordPress sites](https://intel.threadlinqs.com/threat/TL-2026-2988) — HIGH · 2026-10-06

## Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-10.

**Other references**

- [wordfence.com](https://www.wordfence.com/threat-intel/vulnerabilities/id/fc620054-00ed-4c2e-9448-b40ae28efff3?source=cve)
- [plugins.trac.wordpress.org](https://plugins.trac.wordpress.org/browser/woo-product-bundle/tags/8.6.5/includes/class-backend.php#L1949)
- [plugins.trac.wordpress.org (class woosb)](https://plugins.trac.wordpress.org/browser/woo-product-bundle/tags/8.6.5/includes/class-woosb.php#L1197)
- [plugins.trac.wordpress.org (class woosb)](https://plugins.trac.wordpress.org/browser/woo-product-bundle/tags/8.6.5/includes/class-woosb.php#L584)
- [plugins.trac.wordpress.org (class woosb)](https://plugins.trac.wordpress.org/browser/woo-product-bundle/tags/8.6.5/includes/class-woosb.php#L579)

_Showing 5 of 6 recorded references._

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-93836
Full detection coverage and IOCs for threats exploiting CVE-2026-93836 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp