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Case File

CVE-2021-41836

MEDIUM · CVSS 4.8 EPSS 0.56%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-12-14 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 4.8. It affects WordPress.

CVE
CVE-2021-41836
Severity
MEDIUM
CVSS
4.8
EPSS
0.56%
WordPress

Original NVD Description

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.