PT-2026-28201 · Trainingbusinesspros · Formlift For Infusionsoft Web Forms

Nabil Irawan

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Published

2026-03-26

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Updated

2026-03-26

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CVE-2026-4281

CVSS v3.1

5.3

Medium

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
The FormLift for Infusionsoft Web Forms plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 7.5.21. This is due to missing capability checks on the connect() and listen for tokens() methods of the FormLift Infusionsoft Manager class, both of which are hooked to 'plugins loaded' and execute on every page load. The connect() function generates an OAuth connection password and leaks it in the redirect Location header without verifying the requesting user is authenticated or authorized. The listen for tokens() function only validates the temporary password but performs no user authentication before calling update option() to save attacker-controlled OAuth tokens and app domain. This makes it possible for unauthenticated attackers to hijack the site's Infusionsoft connection by first triggering the OAuth flow to obtain the temporary password, then using that password to set arbitrary OAuth tokens and app domain via update option(), effectively redirecting the plugin's API communication to an attacker-controlled server.

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-4281

Affected Products

Formlift For Infusionsoft Web Forms