CVE-2023-47865: Username and Icon override can be used by members when Hardened Mode is enabled
First published: Mon Nov 27 2023(Updated: )
Mattermost fails to check if hardened mode is enabled when overriding the username and/or the icon when posting a post. If settings allowed integrations to override the username and profile picture when posting, a member could also override the username and icon when making a post even if the Hardened Mode setting was enabled
Credit: responsibledisclosure@mattermost.com responsibledisclosure@mattermost.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| go/github.com/mattermost/mattermost-server/v6 | <7.8.13 | 7.8.13 |
| go/github.com/mattermost/mattermost/server/v8 | <8.1.4 | 8.1.4 |
| Mattermost Mattermost | <=7.8.12 | |
| Mattermost Mattermost | >=8.0.0<=8.1.3 |
Remedy
Update Mattermost Server to versions 7.8.13, 8.1.4 or higher.
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Reference Links
Frequently Asked Questions
What is CVE-2023-47865?
CVE-2023-47865 is a vulnerability in Mattermost that allows members to override the username and icon when posting a message, even when Hardened Mode is enabled.
How does CVE-2023-47865 impact Mattermost?
CVE-2023-47865 allows members to bypass the restrictions of Hardened Mode and override the username and icon when making a post.
What is the severity of CVE-2023-47865?
The severity of CVE-2023-47865 is medium with a CVSS score of 4.3.
Which versions of Mattermost are affected by CVE-2023-47865?
Mattermost versions 7.8.13 and earlier, as well as versions 8.1.4 and earlier, are affected by CVE-2023-47865.
How can I fix CVE-2023-47865 in Mattermost?
To fix CVE-2023-47865, update your Mattermost instance to version 7.8.14 or later, or version 8.1.5 or later.
- collector/github-advisory-latest
- alias/GHSA-jj46-9cgh-qmfx
- alias/CVE-2023-47865
- collector/nvd-api
- collector/nvd-cve
- collector/github-advisory
- agent/author
- agent/weakness
- agent/tags
- agent/event
- agent/references
- agent/severity
- agent/title
- agent/type
- agent/description
- agent/remedy
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- package-manager/go
- vendor/mattermost
- canonical/mattermost mattermost
- version/mattermost mattermost/7.8.12
- version/mattermost mattermost/8.0.0
- version/mattermost mattermost/8.1.3