{"id":"CVE-2023-32682","aliases":["GHSA-26c5-ppr8-f33p","PYSEC-2023-84"],"url":"https://o3.security/vulnerability/CVE-2023-32682","summary":"Improper checks for deactivated users during login in synapse","details":"Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. In affected versions it may be possible for a deactivated user to login when using uncommon configurations. This only applies if any of the following are true: 1. JSON Web Tokens are enabled for login via the `jwt_config.enabled` configuration setting. 2. The local password database is enabled via the `password_config.enabled` and `password_config.localdb_enabled` configuration settings *and* a user's password is updated via an admin API after a user is deactivated. Note that the local password database is enabled by default, but it is uncommon to set a user's password after they've been deactivated. Installations that are configured to only allow login via Single Sign-On (SSO) via CAS, SAML or OpenID Connect (OIDC); or via an external password provider (e.g. LDAP) are not affected. If not using JSON Web Tokens, ensure that deactivated users do not have a password set. This issue has been addressed in version 1.85.0. Users are advised to upgrade.","published":"2023-06-06T18:20:14.377Z","modified":"2026-08-12T03:51:44.802431579Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"matrix-synapse","fixedVersion":"1.85.0"}],"fix":{"url":"https://github.com/matrix-org/synapse/pull/15624","label":"matrix-org/synapse#15624"},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6DH5A5YEB5LRIPP32OUW25FCGZFCZU2/"},{"type":"WEB","url":"https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#create-or-modify-account"},{"type":"WEB","url":"https://matrix-org.github.io/synapse/latest/jwt.html"},{"type":"WEB","url":"https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#password_config"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/32xxx/CVE-2023-32682.json"},{"type":"ADVISORY","url":"https://github.com/matrix-org/synapse/security/advisories/GHSA-26c5-ppr8-f33p"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-32682"},{"type":"FIX","url":"https://github.com/matrix-org/synapse/pull/15624"},{"type":"FIX","url":"https://github.com/matrix-org/synapse/pull/15634"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:44.802431579Z"}}