CVE-2026-12136 Cross-site scripting in SysBasics Customize My Account for WooCommerce – Dashboard, Endpoints, Avatar & Menu Manager
Authenticated attackers with Contributor access can inject arbitrary scripts via shortcode attributes, leading to stored XSS execution on victim pages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-12136?
CVE-2026-12136 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. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-12136?
How do I fix CVE-2026-12136?
No fix has been published for CVE-2026-12136 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-2026-12136 being exploited?
There is no known exploitation of CVE-2026-12136 in the wild and no public exploit code.
Sources
Also known as GHSA-84h2-q86p-qhrg.