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CVE-2026-74001 – Authentication Bypass / Account Takeover – WordPress User Registration & Membership

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Summary

CVE-2026-74001 is a critical authentication bypass vulnerability in the WordPress "User Registration & Membership Pro" plugin developed by WPEverest. The flaw (CWE-288, Authentication Bypass Using an Alternate Path or Channel) allows unauthenticated attackers to achieve account takeover without any user interaction. It affects all plugin versions up to and including 5.4.5 and carries a CVSS v3.1 base score of 9.8 (Critical).

Technical details

  • Root cause: The plugin performs authentication/authorization checks through an alternate path or channel that can be bypassed, rather than enforcing a single validated authentication flow (CWE-288).
  • Trigger conditions: No authentication or user interaction is required to exploit the flaw.
  • Attack vector: Network — the vulnerability is remotely exploitable over HTTP(S) against any internet-facing WordPress site running the affected plugin.
  • Impact: Successful exploitation results in unauthenticated account takeover, with high impact to confidentiality, integrity, and availability of the affected site.

Affected software

  • WPEverest "User Registration & Membership Pro" WordPress plugin, versions ≤ 5.4.5
  • Fixed in version 5.4.6

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Update the User Registration & Membership Pro plugin to version 5.4.6 or later.
  • If immediate patching is not possible, consider temporarily disabling the plugin or restricting access to registration/authentication-related endpoints until the update can be applied.
  • Review site user accounts (particularly administrator accounts) for any unauthorized creation or modification following disclosure of this vulnerability.

References

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