CVE-2023-47858: Details of archived public channels are leaked to members of another team
First published: Tue Jan 02 2024(Updated: )
Mattermost fails to properly verify the permissions needed for viewing archived public channels, allowing a member of one team to get details about the archived public channels of another team via the GET /api/v4/teams/<team-id>/channels/deleted endpoint.
Credit: responsibledisclosure@mattermost.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| go/github.com/mattermost/mattermost/server/v8 | <=8.1.0 | 8.1.1 |
| go/github.com/mattermost/mattermost-server/v6 | <=7.8.9 | 7.8.10 |
| Mattermost | <8.1.7 | |
| Mattermost | >=9.0.0<9.0.5 | |
| Mattermost | >=9.1.0<9.1.4 | |
| Mattermost | >=9.2.0<9.2.3 |
Remedy
Update Mattermost Server to versions 8.1.7, 9.0.5, 9.1.4, 9.2.3 or higher.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2023-47858?
CVE-2023-47858 is considered a critical vulnerability that allows unauthorized access to archived public channels.
How do I fix CVE-2023-47858?
To fix CVE-2023-47858, update Mattermost to version 8.1.1 or later for the v8 branch, or to version 7.8.10 or later for the v6 branch.
Which Mattermost versions are affected by CVE-2023-47858?
CVE-2023-47858 affects Mattermost versions up to 8.1.0 for v8 and up to 7.8.9 for v6.
What type of attack does CVE-2023-47858 facilitate?
CVE-2023-47858 facilitates unauthorized information disclosure by allowing team members to view archived public channels of other teams.
Who is impacted by CVE-2023-47858?
Any Mattermost user in teams configured with archived public channels can be impacted if they have access to the specified API endpoint.
- agent/author
- agent/type
- agent/first-publish-date
- agent/remedy
- agent/severity
- agent/title
- agent/weakness
- agent/references
- agent/softwarecombine
- agent/description
- collector/mitre-cve
- source/MITRE
- collector/github-advisory-latest
- source/GitHub
- alias/GHSA-w88v-pjr8-cmv2
- alias/CVE-2023-47858
- agent/software-canonical-lookup
- agent/last-modified-date
- agent/event
- collector/github-advisory
- agent/trending
- agent/source
- agent/tags
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup-request
- collector/nvd-cve
- package-manager/go
- vendor/mattermost
- canonical/mattermost
- version/mattermost/9.0.0
- version/mattermost/9.1.0
- version/mattermost/9.2.0