CVE-2021-4074

WHMCS Bridge <= 6.1 Subscriber+ Stored Cross-Site Scripting

Published Jan 18, 2022 CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

Update to version 6.3, or newer.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-33967 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.
History
Type Values Removed Values Added
Metrics epss

{'score': 0.0012}

epss

{'score': 0.00114}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Wordfence
Published
Updated
Feb 14, 2025, 5:47 PM
Reserved
Dec 6, 2021, 12:00 AM
Status
Modified
Published
Jan 18, 2022, 5:15 PM
Modified
Jun 17, 2026, 4:18 AM