Is Mailonix safe to use?

Laskyr does not give safety verdicts. No known unpatched vulnerabilities in the latest version (1.3.5). As of 2026-11-04. 3 issues are on record for older versions; version 1.3.5 or newer fixes all of them that state a fix. Keep Mailonix on the latest version (1.3.5) and remove it if you do not use it.

Which versions of Mailonix are vulnerable?

Known issues on record (newest first): Remote code execution (1.3.4 and older, fixed in 1.3.5); Stored cross-site scripting (XSS) (1.2.17 and older, fixed in 1.2.18); Stored cross-site scripting (XSS) (1.2.9.1 and older, fixed in 1.2.9.2). The full list with sources is on this page.

What is the latest version of Mailonix?

1.3.5, according to wordpress.org (last updated 2026-10-08). It has 20,000+ active installs.

What should I do if my Mailonix is out of date?

Take a backup, then update it from Dashboard > Updates (or run wp plugin update email-template-customizer-for-woo). If you cannot update right away, deactivate it until you can. If you think the site was already attacked, run a free scan at https://laskyr.com/scan.

Plugins · email-template-customizer-for-woo · data as of 2026-11-04

Is Mailonix safe? Known vulnerabilities and latest version

Latest version: 1.3.5
Last updated: 2026-10-08
Active installs: 20,000+
Known issues on record: 3
Unpatched in latest: 0
Tested up to WP: 7.1.4 · PHP 7.4+

Make your WooCommerce emails become professional. — by VillaTheme

What to do

Update to the latest version (1.3.5). Anything older than 1.3.5 has at least one known issue listed below. Dashboard → Updates, or Plugins → “update now”.
If you cannot update right away, deactivate it until you can.
Turn on auto-updates for it: Plugins → “Enable auto-updates” on its row.
If you ran a vulnerable version and something looks off (spam pages, strange admins, redirects), run the free scan.

With WP-CLI: wp plugin get email-template-customizer-for-woo --field=version shows what you run; wp plugin update email-template-customizer-for-woo updates it.

Check your version

Known vulnerabilities

3 on record, newest first. “Affected” is the version range the source gives; “fixed in” is the version the source names, or (marked *) the first wordpress.org release after the last affected version.

high 7.5 CVE-2026-103358 · published 2026-10-14

Remote code execution in Mailonix (1.3.4 and older)

Affected: 1.3.4 and older
Fixed in: 1.3.5
Access needed (per CVSS): No login needed
Range from: CVE record (the advisory publisher) · score by Patchstack

Details from the advisory

Improper Control of Generation of Code ('Code Injection') vulnerability in VillaTheme Email Template Customizer for WooCommerce email-template-customizer-for-woo allows Code Injection.This issue affects Email Template Customizer for WooCommerce: from n/a through 1.3.4.

NVD CVE-2026-103358 Patchstack advisory

medium 5.9 CVE-2025-64200 · published 2025-10-29

Stored cross-site scripting (XSS) in Mailonix (1.2.17 and older)

Affected: 1.2.17 and older
Fixed in: 1.2.18
Access needed (per CVSS): Needs an admin-level account; someone on the site has to click a link or open a page
Range from: CVE record (the advisory publisher) · score by Patchstack

Details from the advisory

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in VillaTheme Email Template Customizer for WooCommerce email-template-customizer-for-woo allows Stored XSS.This issue affects Email Template Customizer for WooCommerce: from n/a through <= 1.2.17.

NVD CVE-2025-64200 Patchstack advisory

medium 4.8 CVE-2024-49288 · published 2024-10-17

Stored cross-site scripting (XSS) in Mailonix (1.2.9.1 and older)

Affected: 1.2.9.1 and older
Fixed in: 1.2.9.2
Access needed (per CVSS): Needs an admin-level account; someone on the site has to click a link or open a page
Range from: CVE record (the advisory publisher) · score by NVD

Details from the advisory

NVD CVE-2024-49288 Patchstack advisory

Recent activity

2026-10-08 — latest release on wordpress.org (1.3.5).
2026-10-14 — Remote code execution disclosed (CVE-2026-103358), fixed in 1.3.5.
2025-10-29 — Stored cross-site scripting (XSS) disclosed (CVE-2025-64200), fixed in 1.2.18.
2024-10-17 — Stored cross-site scripting (XSS) disclosed (CVE-2024-49288), fixed in 1.2.9.2.

Free. We check the CVE feeds every day and email you only when a new issue for Mailonix (email-template-customizer-for-woo) is published or a fix ships. Unsubscribe in one click.

Browse vulnerabilities

Types found in this plugin: Cross-site scripting (XSS) (2) · Remote code execution (1)

Where this data comes from

Version, last update, installs: wordpress.org/plugins/email-template-customizer-for-woo (Plugins API), fetched 2026-11-04.
Vulnerabilities: NIST National Vulnerability Database (NVD), checked 2026-11-04. This product uses data from the NVD API but is not endorsed or certified by the NVD.
Each record links to its CVE page and to the original advisory (Wordfence, Patchstack or WPScan) where there is one. We only list a CVE here when its references or its advisory name this exact plugin, so a few real issues may be missing; none should be about a different plugin. Spot an error? Email Daniel.

Badge for your site or docs (states facts with a date, not a verdict):

<a href="https://laskyr.com/plugins/email-template-customizer-for-woo"><img src="https://laskyr.com/plugins/email-template-customizer-for-woo/badge.svg" alt="Mailonix vulnerability status"></a>

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Is Mailonix safe? Known vulnerabilities and latest version

No known unpatched vulnerabilities in the latest version (1.3.5)

What to do

Check your version

Known vulnerabilities

Remote code execution in Mailonix (1.3.4 and older)

Stored cross-site scripting (XSS) in Mailonix (1.2.17 and older)

Stored cross-site scripting (XSS) in Mailonix (1.2.9.1 and older)

Recent activity

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Browse vulnerabilities

Where this data comes from