# CVE-2026-104023: Supsystic Smart Popup SQL injection in sidx parameter

Source: https://junglewise.ai/threats/cve-2026-104023-the-smart-popup-by-supsystic-plugin-for-wordpress-is-vulnerable  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-10. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-104023 · Severity: medium · CVSS 4.9 · Published 2026-10-10

The Smart Popup by Supsystic plugin for WordPress, used to create and manage popup campaigns on websites, contains a SQL injection vulnerability in the 'sidx' parameter. Authenticated administrators can exploit this flaw to extract sensitive data from the website's database, potentially exposing customer records, credentials, or other confidential information stored by the site.

Technologies: [Supsystic Smart Popup](https://junglewise.ai/threats/technologies/smart-popup). Vendors: [Supsystic](https://junglewise.ai/threats/vendors/supsystic).

## Quick answers

**Is CVE-2026-104023 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-104023 being exploited in the wild.

**How severe is CVE-2026-104023?** Medium severity, with a CVSS score of 4.9, published 10 October 2026.

**Which products and versions are affected?** Supsystic Smart Popup up to 1.13.2.

**Is there a fix for CVE-2026-104023?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-104023 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-104023?** Check whether you run Supsystic Smart Popup at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a SQL injection flaw in the 'sidx' parameter caused by insufficient input escaping and improper SQL query parameterization. Only authenticated users with administrator-level privileges can trigger the vulnerability via the plugin's API. An attacker with admin access can append arbitrary SQL queries to extract or manipulate database contents without code execution.

## Affected products

- Supsystic Smart Popup up to 1.13.2

## Timeline

- 2026-10-10: disclosed

## References

- [https://plugins.trac.wordpress.org/browser/popup-by-supsystic/](https://plugins.trac.wordpress.org/browser/popup-by-supsystic/)
- [https://plugins.trac.wordpress.org/browser/popup-by-supsystic/tags/1.13.2/classes/controller.php](https://plugins.trac.wordpress.org/browser/popup-by-supsystic/tags/1.13.2/classes/controller.php)

## Related threats

- [Smart Popup by Supsystic server-side template injection in popup text block](https://junglewise.ai/threats/cve-2026-115223-the-smart-popup-by-supsystic-wordpress-plugin-before-2-0-2-does)
- [Smart Popup by Supsystic SSRF in MailChimp lookup](https://junglewise.ai/threats/cve-2026-115225-the-customer-engagement-system-wordpress-plugin-before-2-0-2)
- [Supsystic Smart Popup privilege escalation via permission collision](https://junglewise.ai/threats/cve-2026-18322-supsystic-smart-popup-privilege-escalation-via-permission)