CVE-2026-96660 User Registration & Membership <= 5.2.8 - Unauthenticated Stored Cross-Site Scripting via Checkbox Field Value
Unauthenticated attackers can inject arbitrary scripts via checkbox fields in this WordPress plugin, leading to stored XSS execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-96660?
CVE-2026-96660 is a high-severity cross-site scripting vulnerability in wpeverest User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder, published on 17 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Checkbox Field Value in all versions up to, and including, 5.2.8 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The nopriv AJAX action user_registration_user_form_submit reaches ur_process_registration() without nonce validation, meaning any unauthenticated request can reach the vulnerable code path.
Weakness: CWE-79
Which versions are affected by CVE-2026-96660?
How do I fix CVE-2026-96660?
No fix has been published for CVE-2026-96660 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-2026-96660 being exploited?
There is no known exploitation of CVE-2026-96660 in the wild and no public exploit code.
Sources
Also known as GHSA-mc7j-c3xf-rrxf.