Pix for WooCommerce <= 1.5.0 - Unauthenticated Arbitrary File Upload
70Vexday Risk Score
Patch soon. It has a working public exploit.
ssvc Attendcvss 9.8epss 25%
from disclosure to weapon79 days
Published on NVDMar 13
1st PoC+79d
metasploitMar 12
exploitation probability
25%top 2% of all CVEs
observed exploitation
nono source reports it
6 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 WooCommercepublic PoCs found — 6
exploitdbwww.exploit-db.com/exploits/52642unverifiedgithubgithub.com/m4sh-wacker/CVE-2026-3891-Pix-for-WooCommerce-Plugin-Exploit★ 20githubgithub.com/shinthink/CVE-2026-3891★ 4githubgithub.com/willygailo/CVE-2026-3891-Linux★ 2githubgithub.com/Ch4120N/CVE-2026-3891★ 2githubgithub.com/VeronnX666/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