{"id":"CVE-2020-36320","aliases":["GHSA-42j4-733x-5vcf"],"url":"https://o3.security/vulnerability/CVE-2020-36320","summary":"Regular expression denial of service (ReDoS) in EmailValidator class in Vaadin 7","details":"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.","published":"2021-04-23T16:15:08.360Z","modified":"2026-07-08T20:43:00.384998Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Maven","name":"com.vaadin:vaadin-bom","fixedVersion":"7.7.22"},{"ecosystem":"Maven","name":"com.vaadin:vaadin-server","fixedVersion":"7.7.22"}],"fix":{"url":"https://github.com/vaadin/framework/pull/12104","label":"vaadin/framework#12104"},"references":[{"type":"ADVISORY","url":"https://vaadin.com/security/cve-2020-36320"},{"type":"FIX","url":"https://github.com/vaadin/framework/issues/7757"},{"type":"FIX","url":"https://github.com/vaadin/framework/pull/12104"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T20:43:00.384998Z"}}