CVE-2021-21610: Cross-site Scripting

January 13, 2021 (updated November 2, 2023)

Jenkins does not implement any restrictions for the URL rendering a formatted preview of markup passed as a query parameter, resulting in a reflected cross-site scripting (XSS) vulnerability if the configured markup formatter does not prohibit unsafe elements (JavaScript) in markup.

References

nvd.nist.gov/vuln/detail/CVE-2021-21610
www.jenkins.io/security/advisory/2021-01-13/

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