HOME VULNERABILITIESCVE-2023-32682

MEDIUM

CVE-2023-32682

CWE-287Published: June 6, 2023· Updated: Jun 17, 2026

5.4

CVSS v3.1

Official Description

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.

Technical Analysis

CVE-2023-32682 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected Vendors & Products

matrix1 product(s)

synapse

Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/matrix-org/synapse/pull/15624

PATCHhttps://github.com/matrix-org/synapse/pull/15634

PATCHhttps://github.com/matrix-org/synapse/security/advisories/GHSA-26c5-ppr8-f33p

PATCHhttps://github.com/matrix-org/synapse/pull/15624

PATCHhttps://github.com/matrix-org/synapse/pull/15634

PATCHhttps://github.com/matrix-org/synapse/security/advisories/GHSA-26c5-ppr8-f33p

All References (14)

→

https://github.com/matrix-org/synapse/pull/15624Patch

→

https://github.com/matrix-org/synapse/pull/15634Patch

→

https://github.com/matrix-org/synapse/security/advisories/GHSA-26c5-ppr8-f33pMitigation · Patch · Vendor Advisory

→

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6DH5A5YEB5LRIPP32OUW25FCGZFCZU2/

→

https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#create-or-modify-accountProduct

→

https://matrix-org.github.io/synapse/latest/jwt.htmlProduct

→

https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#password_configProduct

→

https://github.com/matrix-org/synapse/pull/15624Patch

→

https://github.com/matrix-org/synapse/pull/15634Patch

→

https://github.com/matrix-org/synapse/security/advisories/GHSA-26c5-ppr8-f33pMitigation · Patch · Vendor Advisory

→

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6DH5A5YEB5LRIPP32OUW25FCGZFCZU2/

→

https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#create-or-modify-accountProduct

→

https://matrix-org.github.io/synapse/latest/jwt.htmlProduct

→

https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#password_configProduct

Quick Facts

CVE IDCVE-2023-32682

CVSS Score5.4 / 10

SeverityMEDIUM

WeaknessCWE-287

CISA KEVNo

Affected1 vendor(s)

PublishedJun 6, 2023

Related CVEs (CWE-287)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2023-32682 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.

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