Improper access control in Zoho ManageEngine ADSelfService Plus - CVE-2021-40539

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Main Vulnerability Database Vulnerabilities #VU56414

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 v4.0: 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/E:A/U:Red
CVE-ID: CVE-2021-40539
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability: The vulnerability is being exploited in the wild
Vendor: Zoho Corporation
Affected software:
Zoho ManageEngine ADSelfService Plus

Detailed vulnerability description

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.


How to mitigate CVE-2021-40539

Install updates from vendor's website.

Sources