CVE-2021-41836 Fathom Analytics <= 3.0.4 Authenticated Stored Cross-Site Scripting

2021-12-0800:00:00

CWE-79

Wordfence

www.cve.org

4.8 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

0.001 Low

EPSS

Percentile

19.4%

JSON

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.

CNA Affected

[
  {
    "product": "Fathom Analytics ",
    "vendor": "Fathom Analytics ",
    "versions": [
      {
        "lessThanOrEqual": "3.0.4",
        "status": "affected",
        "version": "3.0.4",
        "versionType": "custom"
      }
    ]
  }
]

References

plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2641005%40fathom-analytics&new=2641005%40fathom-analytics&sfp_email=&sfph_mail=

www.wordfence.com/vulnerability-advisories/#CVE-2021-41836