{"cve":"CVE-2020-36320","nvd":{"published":"2021-04-23T16:15:08.360","modified":"2026-06-17T03:15:18.030","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400"],"references":["https://github.com/vaadin/framework/issues/7757","https://github.com/vaadin/framework/pull/12104","https://vaadin.com/security/cve-2020-36320","https://github.com/vaadin/framework/issues/7757","https://github.com/vaadin/framework/pull/12104"],"products":["vaadin:vaadin"],"source":"nvd","synced_at":"2026-10-19T21:17:01.373894544+00:00"},"epss":{"cve":"CVE-2020-36320","score":0.01956,"percentile":0.80277,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-42j4-733x-5vcf","url":"https://osv.dev/vulnerability/GHSA-42j4-733x-5vcf","summary":"Regular expression denial of service (ReDoS) in EmailValidator class in Vaadin 7","modified":"2024-05-15T06:30:47.877972Z","packages":[{"ecosystem":"Maven","name":"com.vaadin:vaadin-bom","purl":"pkg:maven/com.vaadin/vaadin-bom","ranges":[">=7.0.0.beta1 <7.7.22"],"fixed":["7.7.22"]},{"ecosystem":"Maven","name":"com.vaadin:vaadin-server","purl":"pkg:maven/com.vaadin/vaadin-server","ranges":[">=7.0.0.beta1 <7.7.22"],"fixed":["7.7.22"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}