CVE-2026-12137

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

2026-06-17 17:36

Strategic Overview

Status: Patched in 4.3.7
Affected Plugin: SysBasics Customize My Account for WooCommerce – Live My Account Customizer
Affected Version: <= 4.3.6
CVSS: 6.1Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2026-12137

View all SysBasics Customize My Account for WooCommerce – Live My Account Customizer vulnerabilities

At a glance

CVE-2026-12137 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the SysBasics Customize My Account for WooCommerce WordPress plugin, affecting versions <= 4.3.6. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 4.3.7; sites on affected versions should update now. Disclosed June 2026, reported by Chloe Chamberland.

Vulnerability Overview

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.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

SysBasics Customize My Account for WooCommerce <= 4.3.6 carries this weakness at tab, and reaching it takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For SysBasics Customize My Account for WooCommerce the fix is 4.3.7: builds <= 4.3.6 are affected, anything from 4.3.7 onward is not.

Remediation

Update to version 4.3.7, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to SysBasics Customize My Account for WooCommerce: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: SysBasics Customize My Account for WooCommerce 4.3.7 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-12137 https://www.wordfence.com/threat-intel/vulnerabilities/id/74c1bc1d-27f1-4953-8ebd-9396fce0f834 https://nvd.nist.gov/vuln/detail/CVE-2026-12137

Related records

Same weakness class

Other vulnerabilities in SysBasics Customize My Account for WooCommerce – Live My Account Customizer

CVSS Vector

6.1

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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