CVE-2026-3891

Pix for WooCommerce <= 1.5.0 - Unauthenticated Arbitrary File Upload

CVSS 9.8 CRITICALEPSS 0.8%CWE-434

Vexday Risk Score

28Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 9.8EPSS 0.8%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

13 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

linknacional · Pix for WooCommerce

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References

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 https://www.wordfence.com/threat-intel/vulnerabilities/id/20188fd3-c330-4c76-912b-72731e14c450?source=cve