What the vulnerability does
01Description
The Simple User Meta Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the user meta value field in all versions up to, and including, 1.0.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Explanation of Vulnerability in Simple Terms
02Summary
Simple User Meta Editor versions 1.0.0 and earlier contain a cross-site scripting vulnerability in user meta fields. An attacker with high-level site privileges can inject malicious scripts that execute in other users' browsers when they view or edit user metadata. The vulnerability requires high attack complexity and does not require user interaction from the victim.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts into user metadata that execute in other users' browsers.
Potential impact on your site
04Site Impact
Compromised admin or editor accounts can inject scripts affecting other users' sessions and data on your site.
Conditions required to exploit
05Prerequisites
Attacker must have high-level site privileges (e.g., administrator or editor role); no user interaction required from victim.
Key dates
06Disclosure timeline
January 7, 2026
CVE published
April 8, 2026
Record updated
