CVE-2021-4074

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

CVSS 6.4 MEDIUMEPSS 0.6%CWE-79 CWE-862

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.4EPSS 0.6%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

18 Jan 2022Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

WHMCS Bridge · WHMCS Bridge

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References

https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2653041%40whmcs-bridge&new=2653041%40whmcs-bridge&sfp_email=&sfph_mail=https://www.wordfence.com/vulnerability-advisories/#CVE-2021-4074