# CVE-2026-115223: Smart Popup by Supsystic server-side template injection in popup text block

Source: https://junglewise.ai/threats/cve-2026-115223-the-smart-popup-by-supsystic-wordpress-plugin-before-2-0-2-does  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-28. Updated: 2026-10-28  
License: CC BY 4.0 with a link back

CVE-2026-115223 · Severity: medium · CVSS 4.9 · Published 2026-10-28

Smart Popup by Supsystic is a WordPress plugin that creates popup windows for websites. An authenticated administrator can inject malicious template code into popup text blocks that gets executed server-side, allowing them to read sensitive information like database credentials and authentication keys stored as PHP constants.

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

## Quick answers

**Is CVE-2026-115223 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-115223 being exploited in the wild.

**How severe is CVE-2026-115223?** Medium severity, with a CVSS score of 4.9, published 28 October 2026.

**Which products and versions are affected?** Supsystic Smart Popup before 2.0.2.

**Is there a fix for CVE-2026-115223?** Yes: fixed in 2.0.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-115223 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-115223?** 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.

## How to fix

- Fixed in 2.0.2

## Technical details

The plugin contains a server-side template injection (SSTI) vulnerability in its popup text block functionality. A filter intended to strip template delimiters runs before a decoding step that reconstructs them, allowing authenticated administrator-level attackers to inject arbitrary template expressions that are evaluated by the template engine, leading to arbitrary code execution and information disclosure.

## Affected products

- Supsystic Smart Popup before 2.0.2

## Timeline

- 2026-10-26: disclosed
- 2026-10-26: patched: Fixed version 2.0.2 released

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://wpscan.com/vulnerability/cf475664-aa8f-49ec-b1d6-62139dbad8d4/](https://wpscan.com/vulnerability/cf475664-aa8f-49ec-b1d6-62139dbad8d4/)

## Related threats

- [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 SQL injection in sidx parameter](https://junglewise.ai/threats/cve-2026-104023-the-smart-popup-by-supsystic-plugin-for-wordpress-is-vulnerable)
- [Supsystic Smart Popup privilege escalation via permission collision](https://junglewise.ai/threats/cve-2026-18322-supsystic-smart-popup-privilege-escalation-via-permission)