WP Post Author <= 3.2.3 - Privilege Escalation

Improper Privilege Management
CVSS 9.8 (Critical)
Publicly Published June 28, 2023
Last Updated January 22, 2024


The WP Post Author plugin for WordPress is vulnerable to privilege escalation in versions up to, and including, 3.2.3. This is due to insufficient controls on the /set-user-data REST API endpoint. This makes it possible for authenticated attackers to set their user role to administrator and gain complete access to the site. Attackers can easily obtain authenticated access using the /v1/frontend/register-user REST API endpoint, even when registration is disabled on the site.



Vulnerability Details for Enhance Your Posts with the WP Post Author Box, Co-Authors, Guest Authors, and Post Rating System, including Registration Form Builder

Software Type Plugin
Software Slug wp-post-author (view on wordpress.org)
Patched? Yes
Remediation Update to version 3.3.0, or a newer patched version
Affected Version
  • <= 3.2.3
Patched Version
  • 3.3.0

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