#VU50650 Permissions, Privileges, and Access Controls in cPanel - CVE-2021-26266

Vulnerability identifier: #VU50650

Vulnerability risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-26266

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
cPanel
Web applications / Remote management & hosting panels

Vendor: cPanel, Inc

Description

The vulnerability allows a remote user to escalate privileges on the system.

The vulnerability exists due to way cPanel handles account suspensions. A remote user can trigger a logical error by suspending an already suspended account via the WHM API. As a result, a Reseller can bypass the suspension lock.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

cPanel: 11.86.0.1 - 11.92.0.8

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External links
https://news.cpanel.com/cpanel-tsr-2021-0001-full-disclosure/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.