CVE-2025-55073
BaseFortify
Publication date: 2025-11-14
Last updated on: 2025-11-19
Assigner: Mattermost, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mattermost | mattermost_server | From 10.5.0 (inc) to 10.5.12 (exc) |
| mattermost | mattermost_server | From 10.11.0 (inc) to 10.11.4 (exc) |
| mattermost | mattermost_server | From 10.12.0 (inc) to 10.12.1 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-306 | The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in certain Mattermost versions where the system fails to properly validate the relationship between a post being updated and the MSTeams plugin OAuth flow. This flaw allows an attacker to edit arbitrary posts by using a specially crafted MSTeams plugin OAuth redirect URL.
How can this vulnerability impact me? :
An attacker exploiting this vulnerability can modify posts they should not have access to by crafting a malicious OAuth redirect URL. This can lead to unauthorized changes in content, potentially causing misinformation, disruption of communication, or manipulation of data within the Mattermost platform.