CVE-2026-96660 json
User Registration & Membership <= 5.2.8 - Unauthenticated Stored Cross-Site Scripting via Checkbox Field Value
published 2026-10-17 23 d ago modified 2026-10-19 20 d ago also EUVD-2026-103225
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 13%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 21 d ago
Exploit prediction
0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
Affected products
- wpeverest User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
- wordfence.com /threat-intel/vulnerabilities/id/690d23ee-cf70-4ecf-8cd2-21f673788d5f?source=cve
- plugins.trac.wordpress.org /browser/user-registration/tags/5.2.8/includes/functions-ur-template.php#L555
- plugins.trac.wordpress.org /browser/user-registration/tags/5.2.8/includes/frontend/class-ur-frontend-form-handler.php#L519
- plugins.trac.wordpress.org /browser/user-registration/tags/5.2.8/includes/class-ur-ajax.php#L221
- plugins.trac.wordpress.org /browser/user-registration/tags/5.2.8/includes/functions-ur-core.php#L5606
- plugins.trac.wordpress.org /changeset/3741339/user-registration/trunk/includes/frontend/class-ur-frontend-form-handler.php
Sources
- CVE List CVE-2026-96660
- NVD CVE-2026-96660
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