CVE-2026-103076

User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder <= 5.2.8 - Cross-Site Request Forgery

2026-10-13 00:00
b1ue0cean

Strategic Overview

Status
Patched in 5.3.0
Affected Plugin
User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder
Affected Version
<= 5.2.8
CVSS
4.3Medium
Weakness type
CWE-352 · Cross-Site Request Forgery (CSRF)
CVE
CVE-2026-103076
View all User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder vulnerabilities

At a glance

CVE-2026-103076 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the User Registration & Membership WordPress plugin, affecting versions <= 5.2.8. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 5.3.0; sites on affected versions should update now. Disclosed October 2026, reported by b1ue0cean.

Vulnerability Overview

The User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 5.2.8. This is due to missing or incorrect nonce validation on a function. This makes it possible for unauthenticated attackers to perform an unauthorized action via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.

CWE-352: Cross-Site Request Forgery (CSRF)

Reaching this weakness in User Registration & Membership <= 5.2.8 takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.

An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For User Registration & Membership the fix is 5.3.0: builds <= 5.2.8 are affected, anything from 5.3.0 onward is not.

Remediation

Update to version 5.3.0, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to User Registration & Membership: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: User Registration & Membership 5.3.0 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-103076https://www.wordfence.com/threat-intel/vulnerabilities/id/d8e6ebf2-a1b6-45c3-82d0-b94808e90741https://nvd.nist.gov/vuln/detail/CVE-2026-103076

Related records

Other vulnerabilities in User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C