Vulnerability identifier: #VU77060

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-32682

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Synapse
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor: Matrix.org

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper checks for deactivated users during login. A remote user can login when using uncommon configurations.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Synapse: 1.0.0 - 1.84.1

---

External links
http://github.com/matrix-org/synapse/security/advisories/GHSA-26c5-ppr8-f33p
http://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#password_config
http://github.com/matrix-org/synapse/pull/15624
http://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#create-or-modify-account
http://matrix-org.github.io/synapse/latest/jwt.html
http://github.com/matrix-org/synapse/pull/15634
http://github.com/matrix-org/synapse/releases/tag/v1.85.0

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.