# Payment forms, Buy now buttons, and Invoicing System | GetPaid <= 2.8.63 - Missing Authorization to Unauthenticated Sales Report Data Exposure via 'wpi_action' Parameter

- **ID:** WPSEC-2026-1926
- **Plugin:** Payment forms, Buy now buttons, and Invoicing System | GetPaid (`invoicing`), https://wordpress.org/plugins/invoicing/
- **Affected versions:** all versions before 2.8.64
- **Fixed in:** 2.8.64 (Update to 2.8.64 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-862
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-10-29)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/invoicing
- **Fix released:** 2026-10-28
- **Published:** 2026-10-29
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1926/

## Description

The Payment forms, Buy now buttons, and Invoicing System | GetPaid plugin for WordPress is vulnerable to unauthorized access of data via the 'wpi_action' parameter in all versions up to, and including, 2.8.63. This is due to the wpinv_actions() function, which runs on every request, firing any 'wpinv_'-prefixed action named in the user-supplied 'wpi_action' parameter, while the Reports tab renderer hooked to one of those actions has no capability check. This makes it possible for unauthenticated attackers to render the admin Reports tab and view sales totals per item, per payment method and per discount code, including the discount codes that were used.

## References

- https://wpsec.com/vuln/WPSEC-2026-1926/
- https://plugins.svn.wordpress.org/invoicing/tags/2.8.64/
- https://wordpress.org/plugins/invoicing/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1926/

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.