# Payment Forms for Paystack <= 4.0.5 - Authenticated (Subscriber+) Missing Authorization to Payment Data Export

- **ID:** WPSEC-2026-1847
- **Plugin:** Payment Forms for Paystack (`payment-forms-for-paystack`), https://wordpress.org/plugins/payment-forms-for-paystack/
- **Affected versions:** all versions before 4.0.6
- **Fixed in:** 4.0.6 (Update to 4.0.6 or later.)
- **Severity:** Medium 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
- **Weakness:** CWE-862
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-10-28)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/payment-forms-for-paystack
- **Fix released:** 2026-10-27
- **Published:** 2026-10-28
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1847/

## Description

The Payment Forms for Paystack plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check and nonce verification on the export_excel function (admin_post_pff_paystack_export_excel action) in all versions up to, and including, 4.0.5. This makes it possible for authenticated attackers, with Subscriber-level access and above, to export all payment submissions for any form, including customer email addresses, amounts, transaction references and submitted metadata.

Also published later by another source as CVE-2026-66444.

## References

- https://wpsec.com/vuln/WPSEC-2026-1847/
- https://plugins.svn.wordpress.org/payment-forms-for-paystack/tags/4.0.6/
- https://wordpress.org/plugins/payment-forms-for-paystack/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1847/

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.