CVE-2023-27459 WordPress User Registration plugin <= 2.3.2.1 - Authenticated PHP Object Injection vulnerability
Authenticated attackers can exploit unsafe deserialization in the User Registration plugin to potentially execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-27459?
CVE-2023-27459 is a high-severity unsafe deserialization vulnerability in WPEverest User Registration, published on 26 Mar 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Deserialization of Untrusted Data vulnerability in WPEverest User Registration.This issue affects User Registration: from n/a through 2.3.2.1.
Weakness: CWE-502
Which versions are affected by CVE-2023-27459?
It affects 1 product.
Products include Wpeverest User Registration \& Membership.
How do I fix CVE-2023-27459?
No fix has been published for CVE-2023-27459 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2023-27459 being exploited?
There is no known exploitation of CVE-2023-27459 in the wild and no public exploit code.
Other vulnerabilities in WPEverest User Registration
- CVE-2025-2594 User Registration & Membership < 4.1.3 - Authentication Bypass
- CVE-2025-2563 User Registration & Membership < 4.1.2- Unauthenticated Privilege Escalation
- CVE-2025-39400 WordPress User Registration plugin < 4.2.0 - Reflected Cross Site Scripting (XSS) vulnerability
- CVE-2025-30899 WordPress User Registration plugin <= 4.0.3 - Cross Site Scripting (XSS) vulnerability
- CVE-2025-3282 Missing authorization in User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder
Sources
Also known as GHSA-5r7f-qp73-wrxq.