Vulnerability Details : CVE-2021-4074

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.

Vulnerability category: Cross site scripting (XSS)

Published 2022-01-18 17:15:09

Updated 2022-01-24 20:43:14

Source Wordfence

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-4074

Probability of exploitation activity in the next 30 days: 0.05%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 17 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-4074

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
3.5	LOW	AV:N/AC:M/Au:S/C:N/I:P/A:N	6.8	2.9	nvd@nist.gov
Access Vector: Network Access Complexity: Medium Authentication: Single Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
5.4	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N	2.3	2.7	nvd@nist.gov
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: Required Scope: Changed Confidentiality: Low Integrity: Low Availability: None
6.4	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N	3.1	2.7	security@wordfence.com
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Changed Confidentiality: Low Integrity: Low Availability: None

CWE ids for CVE-2021-4074

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Assigned by:
- nvd@nist.gov (Primary)
- security@wordfence.com (Secondary)
CWE-862 Missing Authorization

The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Assigned by: security@wordfence.com (Secondary)

References for CVE-2021-4074

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

Changeset 2653041 for whmcs-bridge – WordPress Plugin Repository
Issue Tracking;Patch;Third Party Advisory
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-4074

Vulnerability Advisories - Wordfence
Third Party Advisory

Products affected by CVE-2021-4074

I-plugins » Whmcs Bridge » For Wordpress
Versions up to, including, (<=) 6.1
cpe:2.3:a:i-plugins:whmcs_bridge:*:*:*:*:*:wordpress:*:*
Matching versions