This security bulletin contains one medium risk vulnerability.
Exploit availability: YesDescription
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 passed to the form authentication example in the examples web application. A remote attacker can trick the victim to follow a specially crafted link 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 updates from vendor's website.Vulnerable software versions
Apache Tomcat: 8.5.0 - 8.5.81, 9.0.0 - 9.0.64, 10.0.0 - 10.0.22, 10.1.0-M1 - 10.1.0-M16
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
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.