[org.jenkins-ci.plugins:claim] XSS vulnerability in Jenkins Claim Plugin

Claim Plugin 2.18.1 and earlier does not escape the user display name shown in claims.

This results in a cross-site scripting (XSS) vulnerability exploitable by attackers who are able to control the display names of Jenkins users, either via the security realm, or directly inside Jenkins.

Everyone with a Jenkins account can change their own display name.\n\nClaim Plugin 2.18.2 escapes the user display name shown in claims.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-21619
• https://www.jenkins.io/security/advisory/2021-02-24/#SECURITY-2188%20(1)
• http://www.openwall.com/lists/oss-security/2021/02/24/3
• https://github.com/advisories/GHSA-48hr-jg4p-w4p4