EUVD-2026-37859
GHSA-84h2-q86p-qhrg
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Network-reachable stored XSS requiring only Contributor auth (PR:L); scope changes to victim browsers; no availability impact.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
Lifecycle Timeline
2DescriptionCVE.org
The Customize My Account For Woocommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'sysbasics_user_avatar' shortcode in versions up to, and including, 4.3.6. This is due to insufficient input sanitization and output escaping on user supplied attributes (min_height, min_width, max_height, max_width) in the wcmamtx_get_avatar_default() function, which are concatenated unescaped into the get_avatar() extra_attr style attribute. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
AnalysisAI
Stored Cross-Site Scripting in the Customize My Account For WooCommerce WordPress plugin (versions up to and including 4.3.6) allows authenticated attackers with Contributor-level access to inject persistent JavaScript payloads via the 'sysbasics_user_avatar' shortcode. The flaw originates in the wcmamtx_get_avatar_default() function, which concatenates unescaped user-supplied shortcode attributes (min_height, min_width, max_height, max_width) directly into the get_avatar() extra_attr style attribute, bypassing sanitization entirely. No active exploitation is confirmed in CISA KEV and no public exploit has been identified at time of analysis, though Wordfence has published full technical details including the vulnerable source lines.
Technical ContextAI
The vulnerability resides in a WordPress plugin authored by phpPoet, identified under CPE cpe:2.3:a:phppoet:sysbasics_customize_my_account_for_woocommerce_-_dashboard,_endpoints,_avatar_&_menu_manager. It extends WooCommerce account management with custom dashboards, endpoints, and avatar upload capabilities. The root cause is CWE-79 (Improper Neutralization of Input During Web Page Generation), specifically the Stored variant: shortcode attributes supplied by a low-privileged user are passed to wcmamtx_get_avatar_default() without sanitization and appended verbatim into the extra_attr parameter of WordPress's get_avatar() function, which renders into the HTML img tag's style attribute. Because shortcode attributes are rendered into a style attribute context without escaping, an attacker can break out of the attribute and inject arbitrary event handlers or script tags. The affected code paths are documented at wcmamtx_extra_functions.php:L163 and sysbasics-avatar-upload.php:L524 and L573.
RemediationAI
An upstream fix has been committed to the WordPress plugin SVN repository at changeset revision 3571110 (https://plugins.trac.wordpress.org/changeset?old=3571110%40customize-my-account-for-woocommerce&new=3571110%40customize-my-account-for-woocommerce); however, the exact patched release version number is not confirmed from the available input data - site administrators should update to the latest available version in the WordPress Plugin Directory and verify it exceeds 4.3.6. As an interim compensating control, site administrators can restrict Contributor-level user registration and ensure untrusted users cannot post shortcode-enabled content, for example by disabling the sysbasics_user_avatar shortcode via a custom filter or capability check - this eliminates the attack surface without removing the plugin entirely. Removing untrusted Contributor accounts until a confirmed patched release is installed is also advisable. No side effects of restricting shortcode access have been identified beyond loss of the custom avatar display feature.
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External POC / Exploit Code
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