CVE-2023-41335

3.7 LOW 0.4% exploit odds Fix listed

What it is

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.

At a glance

Exploitability: Can be exploited locally on the machine with an admin-level account, but needs a user to act. Limited direct impact.
Exploit odds: 0.4% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2023-09-27 15:19 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 06:21 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.4% in the next 30 days (EPSS).
Severity: 3.7 LOW (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2023-09-27 15:19 UTC
Last modified: 2026-06-17 06:21 UTC
Exploit probability: 0.4% · EPSS, next 30 days
Weakness: CWE-312
Record status: Modified

Affected

Matrix Synapse < 1.93.0
Fedoraproject Fedora 37
Fedoraproject Fedora 38

Attack profile CVSS 3.1 · 3.7

Attack vector: Local
Complexity: High
Privileges needed: High
User interaction: Required
Scope: Changed
Confidentiality: Low
Integrity: Low
Availability: None

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2023-41335.md and follow it. Check whether this project is affected by CVE-2023-41335. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record