Live Vulnerability Intelligence
Threat Database
Search CVEs, inspect descriptions, and open detail pages with AI-assisted technical context.
Threat Entry
Updated 2026-06-17
Fathom Analytics - Cross-Site Scripting (XSS) (CVE-2021-41836)
The Fathom Analytics WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and escaping via the $site_id parameter found in the ~/fathom-analytics.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 3.0.4. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.
PLUGIN
Fathom Analytics
CVE-2021-41836
Risk Score