CVE-2025-6831
User Registration <= 4.2.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via urcr_restrict Shortcode
- State
- Published
- Severity
- 6.4 Medium
- Published
- Jul 22, 2025
- Updated
- Apr 8, 2026
- Reserved
- Jun 27, 2025
Description
The User Registration plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's urcr_restrict shortcode in all versions up to, and including, 4.2.4 due to insufficient input sanitization and output escaping on user supplied attributes. 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N | Wordfence |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builderwpeverest |
|
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/50f3e469-f788-45da-95e7-aa6da1e87fd1?source=cve
- https://plugins.trac.wordpress.org/browser/user-registration/tags/4.2.4/modules/content-restriction/class-urcr-shortcodes.php
- https://plugins.trac.wordpress.org/browser/user-registration/tags/4.2.4/modules/content-restriction/class-urcr-shortcodes.php#L147
- https://wordpress.org/plugins/user-registration/#developers
- https://plugins.trac.wordpress.org/changeset/3329704/
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