# Official Integration for Billingo <= 4.3.2 - Unauthenticated Sensitive Information Exposure via Log Files

- **ID:** WPSEC-2026-0615
- **Plugin:** Billingo Official for WooCommerce (`billingo`), https://wordpress.org/plugins/billingo/
- **Affected versions:** from 4.1.4 before 4.3.3
- **Fixed in:** 4.3.3 (Update to 4.3.3 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-532
- **Usage among sites WPSec scans:** plugin Low, affected versions None seen (as of 2026-10-08)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/billingo
- **Fix released:** 2026-08-12
- **Published:** 2026-10-08
- **URL:** https://wpsec.com/vuln/WPSEC-2026-0615/

## Description

The Billingo Official for WooCommerce plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 4.3.2 due to the plugin writing log files with predictable date-based names into a publicly accessible directory without any access protection. This makes it possible for unauthenticated attackers to download the log files and extract order and customer data such as names, VAT numbers and invoice document details.

## References

- https://wpsec.com/vuln/WPSEC-2026-0615/
- https://plugins.svn.wordpress.org/billingo/tags/4.3.3/
- https://wordpress.org/plugins/billingo/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-0615/

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.