Vulnerability 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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/payment-gateway-pix-for-woocommerce/t
- https://plugins.trac.wordpress.org/changeset/3480639/payment-gateway-pix-for-woo
- https://www.wordfence.com/threat-intel/vulnerabilities/id/20188fd3-c330-4c76-912
FAQ
What is CVE-2026-3891?
CVE-2026-3891 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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' ...
How severe is CVE-2026-3891?
CVE-2026-3891 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-3891?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.