Vulnerabilities and security researches forjson-api-user json-api-user

Jul 04, 2026

CVE, Research URL: CVE-2026-9626
Home page URL: Security reports for JSON API User
Application: JSON API User
Date: Jul 03, 2026
Research Description: 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.
Affected versions: max 4.1.2.
Status: vulnerable

Jul 12, 2024

CVE, Research URL: CVE-2024-6624
Home page URL: Security reports for JSON API User
Application: JSON API User
Date: Jul 11, 2024
Research Description: 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.
Affected versions: max 3.9.4.
Status: vulnerable