VULNERABILITY INTELLIGENCE

CVE-2021-4074

CVSS score6.4 MEDIUM

EPSS probability0.56%

CISA KEVNot currently listed

Published2022-01-18

Last modified2026-06-17

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

Description

The WHMCS Bridge WordPress plugin is vulnerable to Stored Cross-Site Scripting via the cc_whmcs_bridge_url parameter found in the ~/whmcs-bridge/bridge_cp.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 6.1. Due to missing authorization checks on the cc_whmcs_bridge_add_admin function, low-level authenticated users such as subscribers can exploit this vulnerability.

Weakness classification

security@wordfence.com: CWE-79
nvd@nist.gov: CWE-79

Primary references

security@wordfence.com — Issue Tracking, Patch, Third Party Advisory
security@wordfence.com — Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory