CVE-2021-41836

MediumCVSS 4.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 4.8/10CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

Vendor	Product	Versions
Fathom Analytics	Fathom Analytics	>= 3.0.4, <= 3.0.4

References

https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2641005%40fathom-analytics&new=2641005%40fathom-analytics&sfp_email=&sfph_mail=Patch, Third Party Advisory
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-41836Third 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=Patch, Third Party Advisory
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-41836Third Party Advisory

Timeline

Published: Dec 14, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-418378.2An issue was discovered in AhciBusDxe in the kernel 5.0 through 5.5 in Insyde InsydeH2O. Because of an Untrusted Pointer Dereference that ca CVE-2021-418388.2An issue was discovered in SdHostDriver in the kernel 5.0 through 5.5 in Insyde InsydeH2O. There is an SMM callout that allows an attacker t CVE-2021-418398.2An issue was discovered in NvmExpressDxe in the kernel 5.0 through 5.5 in Insyde InsydeH2O. Because of an Untrusted Pointer Dereference that CVE-2021-41847.5Infinite loop in the BitTorrent DHT dissector in Wireshark 3.6.0 and 3.4.0 to 3.4.10 allows denial of service via packet injection or crafte CVE-2021-418408.2An issue was discovered in NvmExpressDxe in the kernel 5.0 through 5.5 in Insyde InsydeH2O. There is an SMM callout that allows an attacker CVE-2021-418418.2An issue was discovered in AhciBusDxe in the kernel 5.0 through 5.5 in Insyde InsydeH2O. There is an SMM callout that allows an attacker to CVE-2021-418429.8An issue was discovered in AtaLegacySmm in the kernel 5.0 before 05.08.46, 5.1 before 05.16.46, 5.2 before 05.26.46, 5.3 before 05.35.46, 5.CVE-2021-418436.5An authenticated SQL injection issue in the calendar search function of OpenEMR 6.0.0 before patch 3 allows an attacker to read data from al CVE-2021-418449.8Crocoblock JetEngine before 2.9.1 does not properly validate and sanitize form data.CVE-2021-418456.5A SQL injection issue was discovered in ThycoticCentrify Secret Server before 11.0.000007. The only affected versions are 10.9.000032 throug CVE-2021-418478.8An issue was discovered in 3xLogic Infinias Access Control through 6.7.10708.0, affecting physical security. Users with login credentials as CVE-2021-418487.8An issue was discovered in Luna Simo PPR1.180610.011/202001031830. It mishandles software updates such that local third-party apps can provi