#VU24832 Cross-site scripting in OpenID-Connect-Java-Spring-Server - CVE-2020-5497

Vulnerability identifier: #VU24832

Vulnerability risk: Low

CVSSv4.0: 2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Clear]

CVE-ID: CVE-2020-5497

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
OpenID-Connect-Java-Spring-Server
Server applications / Application servers

Vendor: The MITRE Corporation and MIT KIT

Description

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

The vulnerability exists within the OpenID Connect reference implementation due to insufficient sanitization of user-supplied data in "userInfoJson" in "header.tag". 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 update from vendor's website.

Vulnerable software versions

OpenID-Connect-Java-Spring-Server: 0.9.0 - 1.3.3

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External links
https://github.com/mitreid-connect/OpenID-Connect-Java-Spring-Server/issues/1521

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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.