Threat database

The JSON API Auth plugin for WordPress up to version 3.1.2 suffers from an authentication bypass vulnerability due to cached session cookie disclosure. The parent plugin caches authenticated responses keyed only by URI and query string, ignoring HTTP method and POST body, causing authenticated cookies to be exposed to unauthenticated GET requests. Attackers can retrieve a valid Administrator session cookie and fully authenticate as the Administrator. Exploitation requires the parent plugin to be active with the Auth controller enabled and a recent legitimate Administrator authentication. The vulnerability has a critical CVSS score of 9.8.

The JSON API User plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'content' parameter of the post_comment API endpoint in versions up to, and including, 4.1.0 This is due to insufficient input sanitization in the post_comment() function, which passes the attacker-controlled comment_content value directly to wp_insert_comment() without applying any HTML sanitization, and additionally allows the caller to set comment_approved=1 to self-approve the comment and bypass moderation. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The JSON API User plugin for WordPress is vulnerable to privilege escalation in all versions up to, and including, 3.9.3. This is due to improper controls on custom user meta fields. This makes it possible for unauthenticated attackers to register as administrators on the site. The plugin requires the JSON API plugin to also be installed.