# GSheetConnector For Ninja Forms <= 2.0.2 - Missing Authorization to Authenticated (Subscriber+) Google Sheets Access Code Update

- **ID:** WPSEC-2026-1229
- **Plugin:** GSheetConnector – Ninja Forms Google Sheets Connector, Export Form Submissions Instant Sync to Sheets (`gsheetconnector-ninja-forms`), https://wordpress.org/plugins/gsheetconnector-ninja-forms/
- **Affected versions:** all versions before 3.0.0
- **Fixed in:** 3.0.0 (Update to 3.0.0 or later.)
- **Severity:** Medium 5.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L)
- **Weakness:** CWE-862
- **Usage among sites WPSec scans:** plugin Low, affected versions None seen (as of 2026-10-18)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/gsheetconnector-ninja-forms
- **Fix released:** 2026-10-17
- **Published:** 2026-10-18
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1229/

## Description

The GSheetConnector For Ninja Forms plugin for WordPress is vulnerable to unauthorized modification of data via the verify_njforms_gs_integation AJAX action in all versions up to, and including, 2.0.2, due to a missing capability check. The handler only verifies a nonce, and Subscriber-level users can obtain that nonce from the plugin's settings page. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite the site's stored Google OAuth access code and re-run authorization, replacing the site's Google Sheets connection with one tied to an attacker-controlled Google account and disrupting the sync of form submissions.

## References

- https://wpsec.com/vuln/WPSEC-2026-1229/
- https://plugins.svn.wordpress.org/gsheetconnector-ninja-forms/tags/3.0.0/
- https://wordpress.org/plugins/gsheetconnector-ninja-forms/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1229/

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.