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Fathom Analytics for WP vulnerabilities
Fathom Analytics for WP has 1 known vulnerability in this database. The most recent published record is dated 14 Dec 2021.
- Known vulnerabilities
- 1
- Active installs
- 10,000+
- Latest version
- 3.3.1
- Last updated
- 18 Nov 2025
- Most recent
- 14 Dec 2021
Find it in your WordPress dashboard under Plugins. Severity is based on the CVSS score published with the CVE where one is available.
| Vulnerability | Severity | Affected | Fix | Published |
|---|---|---|---|---|
| Cross-site scripting (XSS) CVE-2021-41836 | Medium 4.8 | Up to 3.0.4 | Fixed in a later version (latest 3.3.1) | 14 Dec 2021 |
Read the published descriptions
- CVE-2021-41836, 14 Dec 2021
- 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. CVE record
What to do if you run Fathom Analytics for WP
If you run Fathom Analytics for WP, open WordPress and check the installed version in Plugins. Compare it with the affected versions in the vulnerability record. If a fixed version is available, take a current backup and update to that version or the latest supported release.
If no fixed version exists, consider disabling and removing the plugin or replacing it with a maintained alternative. After dealing with the affected software, check administrator users, unexpected file changes, redirects, unfamiliar pages and security logs for signs that the site may already have been altered.
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