CVE-2025-12419
Unknown
Unknown - Not Provided
BaseFortify
Vulnerability report for CVE-2025-12419, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2025-11-27
Last updated on: 2025-12-03
Assigner: Mattermost, Inc.
Description
Description
Mattermost versions 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12, 11.0.x <= 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of authentication data during the OAuth completion flow. This requires email verification to be disabled (default: disabled), OAuth/OpenID Connect to be enabled, and the attacker to control two users in the SSO system with one of them never having logged into Mattermost.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mattermost | mattermost_server | From 10.5.0 (inc) to 10.5.13 (exc) |
| mattermost | mattermost_server | From 10.11.0 (inc) to 10.11.5 (exc) |
| mattermost | mattermost_server | From 10.12.0 (inc) to 10.12.2 (exc) |
| mattermost | mattermost_server | From 11.0.0 (inc) to 11.0.4 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-303 | The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect. |
