CVE-2025-24920: Unauthorized Bookmark Creation and Modification in Archived Channels
First published: Fri Mar 21 2025(Updated: )
Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8, 10.5.x <= 10.5.0 fail to restrict bookmark creation and updates in archived channels, which allows authenticated users created or update bookmarked in archived channels
Credit: responsibledisclosure@mattermost.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mattermost | <=10.4.2<=10.3.3<=9.11.8<=10.5.0 | |
| go/github.com/mattermost/mattermost/server/v8 | =10.5.0 | 10.5.1 |
| go/github.com/mattermost/mattermost/server/v8 | >=9.11.0<9.11.9 | 9.11.9 |
| go/github.com/mattermost/mattermost/server/v8 | >=10.3.0<10.3.4 | 10.3.4 |
| go/github.com/mattermost/mattermost/server/v8 | >=10.4.0<10.4.3 | 10.4.3 |
| Mattermost | >=9.11.0<9.11.9 | |
| Mattermost | >=10.3.0<10.3.4 | |
| Mattermost | >=10.4.0<10.4.3 | |
| Mattermost | >=10.5.0<10.5.1 |
Remedy
Update Mattermost to versions 10.6.0, 10.4.3, 10.3.4, 9.11.9, 10.5.1 or higher.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-24920?
CVE-2025-24920 is classified as a medium-severity vulnerability.
How do I fix CVE-2025-24920?
To fix CVE-2025-24920, upgrade Mattermost to versions 10.4.3, 10.3.4, 9.11.9, or 10.5.1 or later.
Who is affected by CVE-2025-24920?
CVE-2025-24920 affects Mattermost versions 10.4.x up to 10.4.2, 10.3.x up to 10.3.3, 9.11.x up to 9.11.8, and 10.5.x up to 10.5.0.
What type of attack is associated with CVE-2025-24920?
CVE-2025-24920 allows authenticated users to create or update bookmarks in archived channels without restriction.
Is there a workaround for CVE-2025-24920?
Currently, there are no official workarounds for CVE-2025-24920; upgrading is the recommended solution.
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