CVE-2026-3891
Pix for WooCommerce <= 1.5.0 - Unauthenticated Arbitrary File Upload
- State
- Published
- Severity
- 9.8 Critical
- Published
- Mar 13, 2026
- Updated
- Apr 8, 2026
- Reserved
- Mar 10, 2026
Description
The Pix for WooCommerce plugin for WordPress is vulnerable to arbitrary file uploads due to missing capability check and missing file type validation in the 'lkn_pix_for_woocommerce_c6_save_settings' function in all versions up to, and including, 1.5.0. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | Wordfence |
Weaknesses
- CWE-434 Unrestricted Upload of File with Dangerous Type
Affected Products
| Product | Versions |
|---|---|
Pix for WooCommercelinknacional |
|
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/20188fd3-c330-4c76-912b-72731e14c450?source=cve
- https://plugins.trac.wordpress.org/browser/payment-gateway-pix-for-woocommerce/tags/1.4.0/Includes/LknPaymentPixForWoocommercePixC6.php#L694
- https://plugins.trac.wordpress.org/changeset/3480639/payment-gateway-pix-for-woocommerce#file56
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