What is CVE-2021-4074?

CVE-2021-4074 is a medium-severity vulnerability in I-Plugins Whmcs Bridge, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2022-01-18.

How severe is CVE-2021-4074?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Is CVE-2021-4074 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in I-Plugins Whmcs Bridge

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 class: XSS (Cross-Site Scripting)

EPSS: 0.006 (43.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

I-plugins Whmcs_bridge
Whmcs Bridge — versions 6.1

Weakness classification (CWE)

Public proof-of-concept exploits

20142995/nuclei-templates

References

security@wordfence.com (Third Party Advisory, x_refsource_MISC)
security@wordfence.com (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2021-4074?: CVE-2021-4074 is a medium-severity vulnerability in I-Plugins Whmcs Bridge, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2022-01-18.
How severe is CVE-2021-4074?: Medium severity. CVSS v3 base score is 6.4 out of 10.
Is CVE-2021-4074 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.