Description
The OpenID Connect reference implementation for MITREid Connect through 1.3.3 allows XSS due to userInfoJson being included in the page unsanitized. This is related to header.tag. The issue can be exploited to execute arbitrary JavaScript.
Remediation
References
https://github.com/mitreid-connect/OpenID-Connect-Java-Spring-Server/issues/1521
https://www.securitymetrics.com/blog/MITREid-Connect-cross-site-scripting-CVE-2020-5497
http://seclists.org/fulldisclosure/2020/Feb/25
http://packetstormsecurity.com/files/156574/MITREid-1.3.3-Cross-Site-Scripting.html
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