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CVE-2026-3891— Pix for WooCommerce <= 1.5.0 - Unauthenticated Arbitrary File Upload

Quick assessment

Affected
linknacional Pix for WooCommerce
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Pix for WooCommerce 1.5.0及之前版本存在代码问题漏洞，该漏洞源于lkn_pix_for_woocommerce_c6_save_settings函数缺少能力检查和文件类型验证，可能导致未经身份

CVSS 9.8 · Critical EPSS 29.73% · P98
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I. Basic Information for CVE-2026-3891

Vulnerability Information
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Vulnerability Title
Pix for WooCommerce <= 1.5.0 - Unauthenticated Arbitrary File Upload
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin Pix for WooCommerce 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Pix for WooCommerce 1.5.0及之前版本存在代码问题漏洞，该漏洞源于lkn_pix_for_woocommerce_c6_save_settings函数缺少能力检查和文件类型验证，可能导致未经身份
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
linknacional Pix for WooCommerce * ~ 1.5.0 -

II. Public POCs for CVE-2026-3891

# POC Description Source Link Shenlong Link
1 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. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-3891.yaml POC Details
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III. Intelligence Information for CVE-2026-3891

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Patches & Fixes for CVE-2026-3891 (2)

Vendor Advisories for CVE-2026-3891 (1)

IV. Related Vulnerabilities

Same vendor: linknacional
Same weakness: CWE-434

V. Comments for CVE-2026-3891

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