CVEs / CVE-2026-3891

CVE-2026-3891: linknacional Pix for WooCommerce vulnerability

critical 9.8 CVSS 3.1 (from the CNA)
EPSS 34.3% chance of exploitation in the next 30 days, higher than 98% of CVEs (8 Nov 2026)
Last changed at its sources 17 Jun 2026

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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.
The CVE record, via NVD · published 13 Mar 2026 · NVD status: Deferred

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
linknacional Pix for WooCommerce	up to and including 1.5.0	—

Exploitation

Not in the CISA Known Exploited Vulnerabilities catalog as of 6 Nov 2026.

Severity

CVSS 3.1	9.8 critical `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Scored by the CNA ([email protected])
Weakness	CWE-434

References

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.