{"id":"CVE-2021-31409","aliases":["EUVD-2021-1033","GHSA-c332-w4jm-55wv"],"status":"published","title":"Server session is not invalidated when logout() helper method of Authentication module is used in Vaadin 18-19","description":"Unsafe validation RegEx in EmailValidator component in com.vaadin:vaadin-compatibility-server versions 8.0.0 through 8.12.4 (Vaadin versions 8.0.0 through 8.12.4) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01672,"percentile":0.76976,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400"],"published":"2021-05-04T17:42:02Z","modified":"2026-10-24T10:50:41Z","fixes":[{"ecosystem":"Maven","package":"com.vaadin:vaadin-compatibility-server","fixed_in":["8.13.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"com.vaadin:vaadin-compatibility-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.0.0"},{"fixed":"8.13.0"}]}]},{"source":"osv","ecosystem":"Maven","package":"com.vaadin:vaadin-compatibility-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.0.0"},{"fixed":"8.13.0"}]}],"versions":["8.0.0","8.0.1","8.0.2","8.0.3","8.0.4","8.0.5","8.0.6","8.0.7","8.1.0","8.1.1","8.1.2","8.1.3","8.1.4","8.1.5","8.1.6","8.1.7","8.1.8","8.10.0","8.10.1","8.10.2","8.10.3","8.10.4","8.10.5","8.11.0","8.11.1","8.11.2","8.11.3","8.12.0","8.12.1","8.12.2","8.12.3","8.12.4","8.2.0","8.2.1","8.3.0","8.3.1","8.3.2","8.3.3","8.4.0","8.4.1","8.4.2","8.4.3","8.4.4","8.4.5","8.5.0","8.5.1","8.5.2","8.6.0","8.6.1","8.6.2","8.6.3","8.6.4","8.7.0","8.7.0.beta1","8.7.1","8.7.2","8.8.0","8.8.1","8.8.2","8.8.3","8.8.4","8.8.5","8.8.6","8.9.0","8.9.1","8.9.2","8.9.3","8.9.4"]}],"products":[{"vendor":"vaadin","product":"vaadin"},{"vendor":"vaadin","product":"vaadin-compatibility-server"}],"references":[{"url":"https://vaadin.com/security/cve-2021-31409","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","web"]},{"url":"https://github.com/vaadin/framework/issues/12240","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/vaadin/framework/pull/12241","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/vaadin/framework/security/advisories/GHSA-c332-w4jm-55wv","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31409","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-c332-w4jm-55wv"}],"sources":{"cve":[{"id":"CVE-2021-31409","title":"Server session is not invalidated when logout() helper method of Authentication module is used in Vaadin 18-19","description":"Unsafe validation RegEx in EmailValidator component in com.vaadin:vaadin-compatibility-server versions 8.0.0 through 8.12.4 (Vaadin versions 8.0.0 through 8.12.4) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.","status":"published","published":"2021-05-05T19:07:30.536Z","modified":"2024-09-17T04:24:18.976Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:33:05.331617Z"}],"euvd":[{"id":"EUVD-2021-1033","description":"Unsafe validation RegEx in EmailValidator component in com.vaadin:vaadin-compatibility-server versions 8.0.0 through 8.12.4 (Vaadin versions 8.0.0 through 8.12.4) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.","status":"published","published":"2021-05-05T19:07:30Z","modified":"2024-09-17T04:24:18Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T00:28:23.50734Z"}],"ghsa":[{"id":"GHSA-c332-w4jm-55wv","title":"Regular expression Denial of Service (ReDoS) in EmailValidator class in V7 compatibility module in Vaadin 8","description":"Unsafe validation RegEx in `EmailValidator` component in `com.vaadin:vaadin-compatibility-server` versions 8.0.0 through 8.12.4 (Vaadin versions 8.0.0 through 8.12.4) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.","status":"published","published":"2021-05-04T17:42:02Z","modified":"2023-02-01T05:05:40Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:36:34.917834Z"}],"nvd":[{"id":"CVE-2021-31409","description":"Unsafe validation RegEx in EmailValidator component in com.vaadin:vaadin-compatibility-server versions 8.0.0 through 8.12.4 (Vaadin versions 8.0.0 through 8.12.4) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.","status":"published","published":"2021-05-06T13:15:12.633Z","modified":"2026-06-17T03:51:43.71Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:06:52.81233Z"}],"osv":[{"id":"CVE-2021-31409","description":"Unsafe validation RegEx in EmailValidator component in com.vaadin:vaadin-compatibility-server versions 8.0.0 through 8.12.4 (Vaadin versions 8.0.0 through 8.12.4) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.","status":"published","published":"2021-05-06T13:15:12.633Z","modified":"2026-10-24T10:50:41.454317576Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:19.483607Z"},{"id":"GHSA-c332-w4jm-55wv","title":"Regular expression Denial of Service (ReDoS) in EmailValidator class in V7 compatibility module in Vaadin 8","description":"Unsafe validation RegEx in `EmailValidator` component in `com.vaadin:vaadin-compatibility-server` versions 8.0.0 through 8.12.4 (Vaadin versions 8.0.0 through 8.12.4) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.","status":"published","published":"2021-05-04T17:42:02Z","modified":"2023-11-08T04:05:48.46742Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:46:44.571161Z"}]}}