Advanced Form Integration <= 2.10.0 - Unauthenticated PHP Object Injection via Nex-Forms Submission Fields
- ID
- WPSEC-2026-0778
- Plugin
- Advanced Form Integration — Connect Forms to 300+ Apps (advanced-form-integration)
- Affected
- all versions before 2.10.3
- Remediation
- Update to 2.10.3 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness
- CWE-502
- Usage
- Plugin Low · Affected versions Low among sites WPSec scans, 2026-10-11
- Attack surface
- Advanced Form Integration on WPSec AttackSurface
- Fix released
- Published
Description
The Advanced Form Integration plugin for WordPress is vulnerable to PHP Object Injection via Nex-Forms submission field values in all versions up to, and including, 2.10.0. This is due to the Nex-Forms trigger passing untrusted field values to maybe_unserialize(). The trigger runs on plugins_loaded for any POST request that contains a 'nex_forms_Id' parameter. It reads field values either straight from $_POST (when the form has no stored entry) or from a stored entry the request can choose, and any value that looks serialized is unserialized. This makes it possible for unauthenticated attackers to inject a PHP object when an integration is connected to a Nex-Forms form. The plugin itself contains no known POP chain. If a POP chain is present through another plugin or theme installed on the site, an attacker could delete arbitrary files, retrieve sensitive data, or execute code.
References
- https://wpsec.com/vuln/WPSEC-2026-0778/
- https://plugins.svn.wordpress.org/advanced-form-integration/tags/2.10.3/
- https://wordpress.org/plugins/advanced-form-integration/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
This advisory as JSON or Markdown · All advisories: JSON, RSS