Description
A cross-site scripting (XSS) vulnerability exists in fields/types/markdown/MarkdownType.js in KeystoneJS before 4.0.0-beta.7 via the Contact Us feature.
Remediation
References
https://github.com/keystonejs/keystone/pull/4478
http://blog.securelayer7.net/keystonejs-open-source-penetration-testing-report/
https://www.exploit-db.com/exploits/43054/
https://packetstormsecurity.com/files/144756/KeystoneJS-4.0.0-beta.5-Unauthenticated-Stored-Cross-Site-Scripting.html
http://www.securityfocus.com/bid/101541
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