CVE-2026-12137 SysBasics Customize My Account for WooCommerce <= 4.3.6 - Reflected Cross-Site Scripting via 'tab' Parameter

Q: What is CVE-2026-12137?

CVE-2026-12137 is a medium-severity cross-site scripting vulnerability in phppoet SysBasics Customize My Account for WooCommerce – Dashboard, Endpoints, Avatar & Menu Manager, published on 18 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Q: Is CVE-2026-12137 being exploited?

There is no known exploitation of CVE-2026-12137 in the wild and no public exploit code.

Q: How do I fix CVE-2026-12137?

No fix has been published for CVE-2026-12137 yet. Limit exposure of the affected software until one is available.

Medium 6.1 Published 18 Jun 2026 Updated 18 Jun 2026

Unauthenticated attackers can inject scripts via the tab parameter, requiring a Shop Manager or higher to click a link, potentially leading to account takeover.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-12137?

CVE-2026-12137 is a medium-severity cross-site scripting vulnerability in phppoet SysBasics Customize My Account for WooCommerce – Dashboard, Endpoints, Avatar & Menu Manager, published on 18 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

The SysBasics Customize My Account for WooCommerce – Dashboard, Endpoints, Avatar & Menu Manager plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'tab' parameter in all versions up to, and including, 4.3.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Because the vulnerable plugin_options_page() function is only rendered within the WordPress admin dashboard, successful exploitation requires the targeted victim to be logged in with Shop Manager-level access or higher.

Weakness: CWE-79

Which versions are affected by CVE-2026-12137?

How do I fix CVE-2026-12137?

No fix has been published for CVE-2026-12137 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-12137 being exploited?