Description
Unsafe validation RegEx in EmailValidator class in com.vaadin:vaadin-server versions 7.0.0 through 7.7.21 (Vaadin 7.0.0 through 7.7.21) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.
Remediation
References
https://github.com/vaadin/framework/issues/7757
https://github.com/vaadin/framework/pull/12104
https://vaadin.com/security/cve-2020-36320
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