CVE-2026-3891

Pix for WooCommerce <= 1.5.0 - Unauthenticated Arbitrary File Upload

9.8 CriticalPublic exploit

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

32.4%Up 32.3 points since Mar 13, 2026

What each source reports

CVE List Score used 9.8

Pix for WooCommerce <= 1.5.0 - Unauthenticated Arbitrary File Upload

Record: CVE-2026-3891
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-434
Updated: 2026-11-02

EUVDEUVD-2026-11760 9.8

Record: EUVD-2026-11760
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-fpj4-w3j6-3v3w 9.8

The Pix for WooCommerce plugin for WordPress is vulnerable to arbitrary file uploads due to...

Record: GHSA-fpj4-w3j6-3v3w
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-434
Updated: 2026-11-02

NVD 9.8

Record: CVE-2026-3891
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-434
Updated: 2026-11-02

Affected products

linknacional pix for woocommerce

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	WooCommerce 1.5.0 - Unauthenticated Arbitrary File Upload	2026-08-17
Metasploit	WordPress Unauthenticated RCE via Pix for WooCommerce plugin	2026-03-12
Nuclei	Pix for WooCommerce <= 1.5.0 - Unauthenticated Arbitrary File Upload
PoC in GitHub	AnggaTechI/Mass-Scanner-CVE-2026-3891	2026-04-16
PoC in GitHub	Ch4120N/CVE-2026-3891	2026-08-03
PoC in GitHub	Nxploited/CVE-2026-3891	2026-03-27
PoC in GitHub	VeronnX666/CVE-2026-3891	2026-07-19
PoC in GitHub	joshuavanderpoll/CVE-2026-3891	2026-03-13
PoC in GitHub	katranSefa/CVE-2026-3891	2026-09-05
PoC in GitHub	m4sh-wacker/CVE-2026-3891-Pix-for-WooCommerce-Plugin-Exploit	2026-07-15
PoC in GitHub	shinthink/CVE-2026-3891	2026-07-15
PoC in GitHub	willygailo/CVE-2026-3891-Linux	2026-05-31

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, Exploit-DB, GitHub Advisories, Metasploit, Nuclei, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-3891 is a critical vulnerability (CVSS 9.8) in Linknacional Pix For Woocommerce, published March 13, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 32.4%, the 98th percentile. No source names a fixed version.