Arbitrary File Upload Vulnerability in Pix for WooCommerce Plugin by WordPress
CVE-2026-3891

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
Pix For WooCommerce
Vendor
CVE Published:
13 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-3891?

The Pix for WooCommerce plugin for WordPress is susceptible to arbitrary file uploads due to a lack of capability checks and insufficient file type validation within the 'lkn_pix_for_woocommerce_c6_save_settings' function. This vulnerability exists across all versions through 1.5.0. An unauthenticated attacker could exploit this flaw to upload malicious files to the site's server, potentially leading to remote code execution and compromising the site's security.

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Deploy the Patch

Affected Version(s)

Pix for WooCommerce * <= 1.5.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-3891
Created by joshuavanderpoll

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/payment-gatewa...
https://plugins.trac.wordpress.org/changeset/3480639/paym...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Alexis Lafontaine
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