CVE-2025-12419
9.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Mattermost | Mattermost | 10.12.0 <= 10.12.1 | affected |
| Mattermost | Mattermost | 10.11.0 <= 10.11.4 | affected |
| Mattermost | Mattermost | 10.5.0 <= 10.5.12 | affected |
| Mattermost | Mattermost | 11.0.0 <= 11.0.3 | affected |
| Mattermost | Mattermost | 11.1.0 | unaffected |
| Mattermost | Mattermost | 10.12.2 | unaffected |
| Mattermost | Mattermost | 10.11.5 | unaffected |
| Mattermost | Mattermost | 10.5.13 | unaffected |
| Mattermost | Mattermost | 11.0.4 | unaffected |
Weaknesses
- CWE-303: CWE-303: Incorrect Implementation of Authentication Algorithm
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
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