CVE-2021-41836

Fathom Analytics <= 3.0.4 Authenticated Stored Cross-Site Scripting

Published Dec 14, 2021 CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed
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.

Analysis

No analysis available yet

Remediation

Vendor Solution

Update to version 3.0.5, or newer.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-28837 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.
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses
  • CWE-79

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Sources

Status
PUBLISHED
Assigner
Wordfence
Published
Updated
Feb 10, 2025, 2:55 PM
Reserved
Dec 3, 2021, 12:00 AM
Status
Modified
Published
Dec 14, 2021, 4:15 PM
Modified
Jun 17, 2026, 4:08 AM