CVE-2021-41836

Fathom Analytics <= 3.0.4 Authenticated Stored Cross-Site Scripting

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.

Remediation

Solution:

  • Update to version 3.0.5, or newer.

Category

4.8
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.32%
Third-Party Advisory wordpress.org Third-Party Advisory wordfence.com
Affected: Fathom Analytics Fathom Analytics
Published at:
Updated at:

References

Link Tags
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-41836 third party advisory
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2641005%40fathom-analytics&new=2641005%40fathom-analytics&sfp_email=&sfph_mail= third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-41836?
CVE-2021-41836 has been scored as a medium severity vulnerability.
How to fix CVE-2021-41836?
To fix CVE-2021-41836: Update to version 3.0.5, or newer.
Is CVE-2021-41836 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-41836 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-41836?
CVE-2021-41836 affects Fathom Analytics Fathom Analytics.
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