#VU24799 Stored cross-site scripting in Kronos webTA - CVE-2020-8493

Vulnerability identifier: #VU24799

Vulnerability risk: Low

CVSSv4.0: 1.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Clear]

CVE-ID: CVE-2020-8493

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Kronos webTA
Client/Desktop applications / Other client software

Vendor: Kronos Incorporated

Description

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

The vulnerability exists due to insufficient sanitization of user-supplied data in the "Login Message", "Banner Message", or "Password Instructions" field of the "/servlet/com.threeis.webta.H261configMenu" servlet. A remote administrator can permanently 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.

This vulnerability affects the following versions of Kronos Web Time and Attendance:

• 3.8.x and later

Mitigation
Install update from vendor's website.

Vulnerable software versions

Kronos webTA: before 4.0

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External links
https://www.nolanbkennedy.com/post/stored-xss-in-kronos-web-time-and-attendance-webta
https://www.kronos.com/products/kronos-webta

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user 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.