What’s Vulnerable › Vulnerabilities

CVE-2026-3601: User Registration & Membership <= 5.1.4 - Missing Authorization to Authenticated (Contributor+) Limited Page Content Modification

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-05 · updated 2026-06-17
• Weakness: CWE-862

Description

The User Registration & Membership plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `embed_form_action()` function in all versions up to, and including, 5.1.4. This makes it possible for authenticated attackers, with Contributor-level access and above, to append shortcode content to arbitrary pages they do not own or have permission to edit.

Affected products

• wpeverest User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Cu: through 5.1.4

References

• https://plugins.trac.wordpress.org/browser/user-registration/tags/5.1.2/includes/admin/class-ur-admin-assets.php#L370
• https://plugins.trac.wordpress.org/browser/user-registration/tags/5.1.2/includes/class-ur-ajax.php#L1003
• https://plugins.trac.wordpress.org/browser/user-registration/trunk/includes/admin/class-ur-admin-assets.php#L370
• https://plugins.trac.wordpress.org/browser/user-registration/trunk/includes/class-ur-ajax.php#L1003
• https://plugins.trac.wordpress.org/changeset/3485702/user-registration/trunk/includes/class-ur-ajax.php?contextall=1
• https://www.wordfence.com/threat-intel/vulnerabilities/id/c8798fb2-4cab-4960-9e32-fd74bb4a5091?source=cve

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