CVE-2021-4074

MEDIUM

WHMCS Bridge < 6.1 - Authenticated Stored Cross-Site Scripting via cc_whmcs_bridge_url Parameter

Title source: llm

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.

References (2)

Core 2

Core References

Third Party Advisory x_refsource_misc

https://www.wordfence.com/vulnerability-advisories/#CVE-2021-4074

Issue Tracking, Patch, Third Party Advisory x_refsource_misc

https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2653041%40whmcs-bridge&new=2653041%40whmcs-bridge&sfp_email=&sfph_mail=

Scores

CVSS v3 6.4

EPSS 0.0056

EPSS Percentile 42.4%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-79 CWE-862

Status published

Products (1)

i-plugins/whmcs_bridge < 6.1

Published Jan 18, 2022

Tracked Since Feb 18, 2026