Tiare Membership <= 1.2 - Unauthenticated Privilege Escalation

Improper Privilege Management
CVE CVE-2025-13540
CVSS Critical (9.8)
Publicly Published November 26, 2025
Last Updated November 27, 2025
Researcher シルAsuna
Description

The Tiare Membership plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.2. This is due to the 'tiare_membership_init_rest_api_register' function not restricting what user roles a user can register with. This makes it possible for unauthenticated attackers to supply the 'administrator' role during registration and gain administrator access to the site.

References

1 affected software package

Software Type Plugin
Software Slug tiare-membership (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 1.2
Patched Version
  • 1.3
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