WordPress plugin

Email Customizer for WooCommerce (Pro) <= 3.9.5 — Authenticated (Subscriber+) Remote Code Execution via 'template' Parameter

CVE-2026-81534Published Oct 14, 2026 · Updated Nov 13, 2026

Affected: ≤3.9.5Update to 3.9.6 or newer

All remediation steps

Watch plugin

Severity

High8.8

CVSS

8.8

CVSS 3.1 · CNA (Wordfence)

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What does this vector mean?

AV:N Attack vector: Network
AC:L Attack complexity: Low
PR:L Privileges required: Low
UI:N User interaction: None
S:U Scope: Unchanged
C:H Confidentiality: High
I:H Integrity: High
A:H Availability: High

Weakness

CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

Required access

Unknown

Exploit prediction (EPSS)

0.5% chance in 30 days40th percentile

CISA KEV

Not listed

On this page7

Am I affected?

Email Customizer for WooCommerce (Pro) woocommerce-email-customizer

Affected≤ 3.9.5
Patched in3.9.6

You are affected if you run ≤ 3.9.5. Version 3.9.6 and later are not affected by this issue.

Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Email Customizer for WooCommerce (Pro).
No admin access? Run a passive check of your site. It reads public files only.

What to do

Update to version 3.9.6, or a newer patched version
Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
Watch Email Customizer for WooCommerce (Pro) to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to theviper17y.

The Email Customizer for WooCommerce (Pro) plugin for WordPress is vulnerable to Remote Code Execution in versions up to, and including, 3.9.5. This is due to insufficient authorization and input sanitization in the send_test_mail() function, which allows user-controlled PHP code to be written to executable files in the uploads directory. This makes it possible for authenticated attackers, with subscriber-level access and above, to execute arbitrary PHP code on the server, leading to full site compromise.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

Advisorywordfence.com

Timeline

Oct 14, 2026
CVE published
Severity high, CVSS 8.8
Nov 13, 2026
Record last updated

Sources & licenses

Wordfence record

Vulnerability data: Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers: Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE: National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
EPSS: Exploit Prediction Scoring System by FIRST.org.

How we use these sources