Vulnerability identifier: #VU53430

Vulnerability risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2021-27956

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Zoho ManageEngine ADSelfService Plus
Client/Desktop applications / Software for system administration

Vendor: Zoho Corporation

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in the "/webclient/index.html#/directory-search" page. A remote attacker can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Zoho ManageEngine ADSelfService Plus: 6100 - 6103

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External links
http://pitstop.manageengine.com/portal/en/community/topic/adselfservice-plus-6104-released-with-an-important-security-fixes
http://raxis.com/blog/cve-2021-27956-manage-engine-xss
http://www.manageengine.com

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.