Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Conva | Fathom Analytics | <= 3.0.4 |
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&oldPatchThird Party Advisory
- https://www.wordfence.com/vulnerability-advisories/#CVE-2021-41836Third Party Advisory
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&oldPatchThird Party Advisory
- https://www.wordfence.com/vulnerability-advisories/#CVE-2021-41836Third Party Advisory
FAQ
What is CVE-2021-41836?
CVE-2021-41836 is a vulnerability with a CVSS score of 4.8 (MEDIUM). 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...
How severe is CVE-2021-41836?
CVE-2021-41836 has been rated MEDIUM with a CVSS base score of 4.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-41836?
Check the references section above for vendor advisories and patch information. Affected products include: Conva Fathom Analytics.