CVE-2023-3343: high-severity vulnerability in wpeverest User Registration & Membership…
User Registration <= 3.0.1 - Authenticated (Subscriber+) PHP Object Injection
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 1.1%
The User Registration plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 3.0.1 via deserialization of untrusted input from the 'profile-pic-url' parameter. This allows authenticated attackers, with subscriber-level permissions and above, to inject a PHP Object. No POP chain is present in the vulnerable plugin. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Related CVEs — wpeverest User Registration & Membership…
In the same product, most dangerous first.
CVE-2026-1492CRITICALUser Registration & Membership <= 5.1.2 - Unauthenticated Privilege Escalation via Membership RegistrationEPSS 28.9%CVE-2023-3342CRITICALUser Registration <= 3.0.2 - Authenticated (Subscriber+) Arbitrary File UploadEPSS 1.7%CVE-2024-2417HIGHUser Registration – Custom Registration Form, Login Form, and User Profile WordPress Plugin <= 3.1.5 - Missing Authorization to Authenticated (Subscriber+) Privilege EscalationEPSS 0.9%CVE-2024-3295MEDIUMUser Registration – Custom Registration Form, Login Form, and User Profile WordPress Plugin <= 3.1.5 - Missing Authorization to Unauthenticated Media DeletionEPSS 0.9%CVE-2026-6203MEDIUMUser Registration & Membership <= 5.1.4 - Unauthenticated Open Redirect via 'redirect_to_on_logout' ParameterEPSS 0.7%CVE-2024-1720MEDIUMUser Registration – Custom Registration Form, Login Form, and User Profile WordPress Plugin <= 3.1.4 - Unauthenticated Stored Self-Based Cross-Site ScriptingEPSS 0.5%
References
https://plugins.trac.wordpress.org/browser/user-registration/tags/3.0.1/includes/functions-ur-core.php#L3156https://plugins.trac.wordpress.org/changeset/2932199/user-registration/trunk/includes/functions-ur-core.php#file0https://www.wordfence.com/threat-intel/vulnerabilities/id/3590277a-3319-4707-b728-d75ea59e8ad9?source=cve