{"schemaVersion":3,"id":"USN-7444-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"matrix-synapse vulnerabilities\n\nIt was discovered that Synapse network policies could be bypassed via\nspecially crafted URLs. An attacker could possibly use this issue to\nbypass authentication mechanisms. (CVE-2023-32683)\n\nIt was discovered that Synapse exposed cached device information. An\nattacker could possibly use this issue to gain access to sensitive\ninformation. (CVE-2023-43796)\n\nIt was discovered that Synapse could be tricked into rejecting state\nchanges in rooms. An attacker could possibly use this issue to cause\nSynapse to stop functioning properly, resulting in a denial of service.\nThis issue was only fixed in Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.\n(CVE-2022-39374)\n\nIt was discovered that Synapse stored user credentials in a server's\ndatabase temporarily. An attacker could possibly use this issue to\ngain access to sensitive information. This issue was only fixed in\nUbuntu 22.04 LTS. (CVE-2023-41335)\n\nIt was discovered that Synapse could incorrectly respond to server\nauthorization events. An attacker could possibly use this issue to\nbypass authentication mechanisms. This issue was only fixed in Ubuntu\n22.04 LTS. (CVE-2022-39335)\n\nIt was discovered that Synapse could be manipulated to mark messages\nas read when they had not been viewed. An attacker could possibly use\nthis issue to perform repudiation-based attacks. This issue was only\nfixed in Ubuntu 22.04 LTS. (CVE-2023-42453)\n\nIt was discovered that Synapse had several memory-related issues. An\nattacker could possibly use this issue to cause Synapse to crash,\nresulting in a denial of service. This issue was only fixed in Ubuntu\n22.04 LTS. (CVE-2024-31208)\n\nIt was discovered that Synapse could run external tools due to a\nunchecked thumbnail rendering routine. An attacker could possibly use\nthis issue to cause Synapse to crash, resulting in a denial of service,\nor execute arbitrary code. This issue was only fixed in Ubuntu\n22.04 LTS. (CVE-2024-53863)","dates":{"published":"2025-04-22T17:24:26.000Z","modified":"2026-04-27T18:02:27.885Z","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~esm4","noFixRecorded":false,"fixedIn":null},{"text":"< 1.11.0-1ubuntu0.1~esm2","noFixRecorded":false,"fixedIn":null},{"text":"< 1.53.0-1ubuntu0.1~esm2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.24.0+dfsg-1ubuntu0.1~esm4 | < 1.11.0-1ubuntu0.1~esm2 | < 1.53.0-1ubuntu0.1~esm2","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-7444-1","label":"ubuntu.com/security/notices/USN-7444-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2022-39335","label":"ubuntu.com/security/CVE-2022-39335","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2022-39374","label":"ubuntu.com/security/CVE-2022-39374","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2023-32683","label":"ubuntu.com/security/CVE-2023-32683","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2023-41335","label":"ubuntu.com/security/CVE-2023-41335","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2023-42453","label":"ubuntu.com/security/CVE-2023-42453","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2023-43796","label":"ubuntu.com/security/CVE-2023-43796","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2024-31208","label":"ubuntu.com/security/CVE-2024-31208","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2024-53863","label":"ubuntu.com/security/CVE-2024-53863","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2022-39335","CVE-2022-39374","CVE-2023-32683","CVE-2023-41335","CVE-2023-42453","CVE-2023-43796","CVE-2024-31208","CVE-2024-53863"],"downstream":[],"duplicates":[],"related":["CVE-2022-39335","CVE-2022-39374","CVE-2023-32683","CVE-2023-41335","CVE-2023-42453","CVE-2023-43796","CVE-2024-31208","CVE-2024-53863"]},"timeline":[{"kind":"published","date":"2025-04-22T17:24:26.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-27T18:02:27.885Z","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":"2026-10-19T21:30:06.075Z","stale":false,"partial":false}}