{"schemaVersion":3,"id":"USN-6076-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"matrix-synapse vulnerabilities\n\nIt was discovered that Synapse incorrectly handled certain inputs. If a\nuser or an automated system were tricked into opening a specially crafted\ninput file, a remote attacker could possibly use this issue to cause a\ndenial of service. (CVE-2019-18835, CVE-2018-12291, CVE-2018-10657)\n\nIt was discovered that Synapse incorrectly handled certain inputs. If a\nuser or an automated system were tricked into opening a specially crafted\ninput file, a remote attacker could possibly use this issue to hijack the\nsession. (CVE-2019-11842, CVE-2018-12423)\n\nIt was discovered that Synapse incorrectly handled certain inputs. If a\nuser or an automated system were tricked into opening a specially crafted\ninput file, a remote attacker could possibly use this issue to perform\nspoofing or user impersonation. (CVE-2019-5885, CVE-2018-16515)","dates":{"published":"2023-05-16T07:45:08.000Z","modified":"2026-02-10T04:43:07.000Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"matrix-synapse","name":"matrix-synapse","label":"matrix-synapse","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/matrix-synapse","purlType":"deb","versions":[{"text":"< 0.24.0+dfsg-1ubuntu0.1~esm1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.24.0+dfsg-1ubuntu0.1~esm1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-6076-1","label":"ubuntu.com/security/notices/USN-6076-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2018-10657","label":"ubuntu.com/security/CVE-2018-10657","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2018-12291","label":"ubuntu.com/security/CVE-2018-12291","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2018-12423","label":"ubuntu.com/security/CVE-2018-12423","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2018-16515","label":"ubuntu.com/security/CVE-2018-16515","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-5885","label":"ubuntu.com/security/CVE-2019-5885","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-11842","label":"ubuntu.com/security/CVE-2019-11842","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-18835","label":"ubuntu.com/security/CVE-2019-18835","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2018-10657","CVE-2018-12291","CVE-2018-12423","CVE-2018-16515","CVE-2019-11842","CVE-2019-18835","CVE-2019-5885"],"downstream":[],"duplicates":[],"related":["CVE-2018-10657","CVE-2018-12291","CVE-2018-12423","CVE-2018-16515","CVE-2019-11842","CVE-2019-18835","CVE-2019-5885"]},"timeline":[{"kind":"published","date":"2023-05-16T07:45:08.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-02-10T04:43:07.000Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T17:40:14.372Z","stale":false,"partial":false}}