Improper access control in Zoho ManageEngine ADSelfService Plus - CVE-2021-40539
Published: September 9, 2021 / Updated: November 24, 2021
Vulnerability identifier: #VU56414
CSH Severity: Critical
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-40539
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to improper access restrictions to the "/RestAPI/LogonCustomization" and "/RestAPI/Connection" REST API endpoints. A remote non-authenticated attacker can send specially HTTP requests to the aforementioned REST API endpoints and execute arbitrary code on the system.
Note, the vulnerability is being actively exploited in the wild.
Affected software
Zoho ManageEngine ADSelfService Plus
How to mitigate CVE-2021-40539
Install updates from vendor's website.
Zoho ManageEngine ADSelfService Plus - update to 6114