---
title: "CVE-2023-41335\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2023-41335?format=md
keywords: index, follow
---

# CVE-2023-41335

Publication date 27 September 2023

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**3.7 · Low**

[Score breakdown](https://ubuntu.com/security/CVE-2023-41335?format=md#impact-score)

Toggle side navigation

## Description

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.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| matrix-synapse | 24.10 oracular | Not affected |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Ignored end of life, was needs-triage |
| 23.04 lunar | Ignored end of life, was needs-triage |
| 22.04 LTS jammy | Fixed 1.53.0-1ubuntu0.1~esm2  Ubuntu Pro |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

### Get expanded security coverage with Ubuntu Pro

Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.

[Get Ubuntu Pro](https://ubuntu.com/pro)
[30-day free trial](https://ubuntu.com/pro/free-trial)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

3.7 · Low

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | Attack complexity | High |
  | Privileges required | High |
  | User interaction | Required |
  | Scope | Changed |
  | Confidentiality impact | Low |
  | Integrity impact | Low |
  | Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 3.7 · Low |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-41335)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2023-41335)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2023-41335)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2023-41335)

### Related Ubuntu Security Notices (USN)

+ [USN-7444-1](https://usn.ubuntu.com/USN-7444-1)
+ Synapse vulnerabilities
+ 22 April 2025

### Other references

* <https://github.com/matrix-org/synapse/pull/16272>
* <https://github.com/matrix-org/synapse/security/advisories/GHSA-4f74-84v3-j9q5>
* <https://www.cve.org/CVERecord?id=CVE-2023-41335>