Vulnerability identifier: #VU81454

Vulnerability risk: Low

CVSSv3.1: 2.4 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-41335

CWE-ID: CWE-312

Exploitation vector: Network

Exploit availability: No

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

Vendor: Matrix.org

Description

The vulnerability allows a user to gain access to sensitive information.

The vulnerability exists due to the way the application handles password change. When users update their passwords, the new credentials may be briefly held in the server database in clear text. A user with access to the database can obtain the password in clear text.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Synapse: 1.66.0 - 1.92.3

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External links
http://github.com/matrix-org/synapse/pull/16272
http://github.com/matrix-org/synapse/security/advisories/GHSA-4f74-84v3-j9q5

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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