# Minimum and Maximum Quantity for WooCommerce <= 2.1.3 - Missing Authorization to Authenticated (Subscriber+) Freemius Account Opt-In

- **ID:** WPSEC-2026-1694
- **Plugin:** Minimum and Maximum Quantity for WooCommerce (`min-and-max-quantity-for-woocommerce`), https://wordpress.org/plugins/min-and-max-quantity-for-woocommerce/
- **Affected versions:** all versions before 2.1.4
- **Fixed in:** 2.1.4 (Update to 2.1.4 or later.)
- **Severity:** Medium 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N)
- **Weakness:** CWE-862
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-10-27)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/min-and-max-quantity-for-woocommerce
- **Fix released:** 2026-10-26
- **Published:** 2026-10-27
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1694/

## Description

The Minimum and Maximum Quantity for WooCommerce plugin for WordPress is vulnerable to unauthorized modification of data via the bundled Freemius SDK's opt-in handler in all versions up to, and including, 2.1.3, due to a missing capability check in the _install_with_new_user() function. The function runs on admin_menu for any logged-in user. This makes it possible for authenticated attackers, with subscriber-level access and above, to connect a site that has not opted in (for example, one where the administrator skipped the opt-in) to a Freemius account and install of their choosing, and to change its tracking permissions, without administrator consent.

## References

- https://wpsec.com/vuln/WPSEC-2026-1694/
- https://plugins.svn.wordpress.org/min-and-max-quantity-for-woocommerce/tags/2.1.4/
- https://wordpress.org/plugins/min-and-max-quantity-for-woocommerce/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1694/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.