CVE-2026-3891criticalCWE-434

CVE-2026-3891: critical vulnerability in linknacional Pix for WooCommerce

Pix for WooCommerce <= 1.5.0 - Unauthenticated Arbitrary File Upload

Published · Updated

70Vexday Risk Score

Patch soon. It has a working public exploit.

ssvc Attendcvss 9.8epss 30%
from disclosure to weapon0 days
Published on NVDMar 13
1st PoCMar 13
metasploitMar 12
exploitation probability
30%top 2% of all CVEs
observed exploitation
nono source reports it
10 public exploit(s)
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
public PoCs found — 10
exploitdbwww.exploit-db.com/exploits/52642unverifiedgithubgithub.com/m4sh-wacker/CVE-2026-3891-Pix-for-WooCommerce-Plugin-Exploit★ 21githubgithub.com/joshuavanderpoll/CVE-2026-3891★ 7githubgithub.com/Nxploited/CVE-2026-3891★ 6githubgithub.com/shinthink/CVE-2026-3891★ 4githubgithub.com/willygailo/CVE-2026-3891-Linux★ 2githubgithub.com/Ch4120N/CVE-2026-3891★ 2githubgithub.com/AnggaTechI/Mass-Scanner-CVE-2026-3891★ 2githubgithub.com/VeronnX666/CVE-2026-3891★ 0githubgithub.com/katranSefa/CVE-2026-3891★ 0
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
https://plugins.trac.wordpress.org/browser/payment-gateway-pix-for-woocommerce/tags/1.4.0/Includes/LknPaymentPixForWoocommercePixC6.php#L694https://plugins.trac.wordpress.org/changeset/3480639/payment-gateway-pix-for-woocommerce#file56https://www.wordfence.com/threat-intel/vulnerabilities/id/20188fd3-c330-4c76-912b-72731e14c450?source=cve