# Smart Popup by Supsystic <= 2.0.0 - Authenticated (Administrator+) SQL Injection via Popup Page and Category Display Lists

- **ID:** WPSEC-2026-1523
- **Plugin:** Customer Engagement System – Popup Builder, Forms, CRM & Email Marketing Automation (`popup-by-supsystic`), https://wordpress.org/plugins/popup-by-supsystic/
- **Affected versions:** all versions before 2.0.2
- **Fixed in:** 2.0.2 (Update to 2.0.2 or later.)
- **Severity:** Medium 4.9 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N)
- **Weakness:** CWE-89
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-10-23)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/popup-by-supsystic
- **Fix released:** 2026-10-22
- **Published:** 2026-10-23
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1523/

## Description

The Popup Builder, Forms, CRM & Email Marketing Automation plugin for WordPress is vulnerable to SQL Injection via the 'show_pages_list', 'not_show_pages_list', 'show_categories_list' and 'not_show_categories_list' parameters when saving a popup in all versions up to, and including, 2.0.0. This is due to the submitted IDs being concatenated directly into INSERT queries without sanitization or integer casting. This makes it possible for authenticated attackers, with administrator-level access and above, to append additional SQL to existing queries and extract sensitive information from the database.

## References

- https://wpsec.com/vuln/WPSEC-2026-1523/
- https://plugins.svn.wordpress.org/popup-by-supsystic/tags/2.0.2/
- https://wordpress.org/plugins/popup-by-supsystic/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1523/

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.