# Contact Form by Supsystic <= 1.10.5 - Unauthenticated Sensitive Information Exposure via Front-End Form Settings

- **ID:** WPSEC-2026-1184
- **Plugin:** Contact Form by Supsystic – Drag & Drop Form Builder with Templates & Form Statistics (`contact-form-by-supsystic`), https://wordpress.org/plugins/contact-form-by-supsystic/
- **Affected versions:** all versions before 1.10.7
- **Fixed in:** 1.10.7 (Update to 1.10.7 or later.)
- **Severity:** Medium 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
- **Weakness:** CWE-200
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-10-17)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/contact-form-by-supsystic
- **Fix released:** 2026-10-16
- **Published:** 2026-10-17
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1184/

## Description

The Contact Form by Supsystic plugin for WordPress is vulnerable to Sensitive Information Exposure via the front-end form settings in all versions up to, and including, 1.10.5. The plugin publishes a form's template settings on every page that shows the form, and the code meant to strip non-public keys from them looked in the wrong array element, so nothing was removed. This makes it possible for unauthenticated attackers to read non-public form configuration from the source of any page that displays a form. That configuration includes the saved test email address, which defaults to the site administrator's email, as well as email attachment, registration and publishing settings, and any third-party integration credentials stored in the form's template settings.

## References

- https://wpsec.com/vuln/WPSEC-2026-1184/
- https://plugins.svn.wordpress.org/contact-form-by-supsystic/tags/1.10.7/
- https://wordpress.org/plugins/contact-form-by-supsystic/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1184/

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.