{"id":"CVE-2019-11340","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-11340","generatedAt":"2026-10-28T19:19:24.217Z","title":"util/emailutils.py in Matrix Sydent before 1.0.2 mishandles registration restrictions that are based on e-mail domain, if the allowed_local_3pids option is enabled.","description":"util/emailutils.py in Matrix Sydent before 1.0.2 mishandles registration restrictions that are based on e-mail domain, if the allowed_local_3pids option is enabled. This occurs because of potentially unwanted behavior in Python, in which an email.utils.parseaddr call on user@bad.example.net@good.example.com returns the user@bad.example.net substring.","published":"2019-04-19T14:29:00.000Z","lastModified":"2026-06-17T02:12:44.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":5.9,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"},"cwe":["CWE-20"],"affected":["matrix/sydent"],"epss":{"score":0.01876,"percentile":0.79296,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.88%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc","tags":["Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/matrix-org/sydent/compare/7c002cd...09278fb","tags":["Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/","tags":["Release Notes","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://twitter.com/matrixdotorg/status/1118934335963500545","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/matrix-org/sydent/compare/7c002cd...09278fb","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2/","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://twitter.com/matrixdotorg/status/1118934335963500545","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-11340","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}