Fathom Analytics <= 3.0.4 - Stored Cross-Site Scripting

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2021-41836
CVSS Medium (4.8)
Publicly Published December 8, 2021
Last Updated January 22, 2024
Researcher José Aguilera
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.

References

1 affected software package

Software Type Plugin
Software Slug fathom-analytics (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 3.0.4
Patched Version
  • 3.0.5
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