{"cve":"CVE-2023-41335","nvd":{"published":"2023-09-27T15:19:30.283","modified":"2026-06-17T06:21:51.080","status":"Modified","description":"Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. When users update their passwords, the new credentials may be briefly held in the server database. While this doesn't grant the server any added capabilities—it already learns the users' passwords as part of the authentication process—it does disrupt the expectation that passwords won't be stored in the database. As a result, these passwords could inadvertently be captured in database backups for a longer duration. These temporarily stored passwords are automatically erased after a 48-hour window. This issue has been addressed in version 1.93.0. Users are advised to upgrade. There are no known workarounds for this issue.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N","score":3.7},"cwes":["CWE-312"],"references":["https://github.com/matrix-org/synapse/pull/16272","https://github.com/matrix-org/synapse/security/advisories/GHSA-4f74-84v3-j9q5","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2AFB2Y3S2VCPCN5P2XCZTG24MBMZ7DM4/","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/65QPC55I4D27HIZP7H2NQ34EOXHPP4AO/","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY/"],"products":["fedoraproject:fedora","matrix:synapse"],"source":"nvd","synced_at":"2026-10-19T21:39:34.467980132+00:00"},"epss":{"cve":"CVE-2023-41335","score":0.00387,"percentile":0.32792,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-4f74-84v3-j9q5","url":"https://osv.dev/vulnerability/GHSA-4f74-84v3-j9q5","summary":"matrix-synapse vulnerable to temporary storage of plaintext passwords during password changes","modified":"2026-09-10T03:50:03.101707044Z","packages":[{"ecosystem":"PyPI","name":"matrix-synapse","purl":"pkg:pypi/matrix-synapse","ranges":[">=1.66.0 <1.93.0"],"fixed":["1.93.0"]}]},{"id":"PYSEC-2023-185","url":"https://osv.dev/vulnerability/PYSEC-2023-185","summary":"","modified":"2023-11-08T04:13:25.665748Z","packages":[{"ecosystem":"PyPI","name":"matrix-synapse","purl":"pkg:pypi/matrix-synapse","ranges":[">=1.66.0 <1.93.0"],"fixed":["1.93.0"]}]}],"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."]}