CVE-2025-12419 (GCVE-0-2025-12419)
Vulnerability from cvelistv5 – Published: 2025-11-27 15:55 – Updated: 2025-12-02 04:55
VLAI?
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.
Severity ?
9.9 (Critical)
CWE
- CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Affected:
10.12.0 , ≤ 10.12.1
(semver)
Affected: 10.11.0 , ≤ 10.11.4 (semver) Affected: 10.5.0 , ≤ 10.5.12 (semver) Affected: 11.0.0 , ≤ 11.0.3 (semver) Unaffected: 11.1.0 Unaffected: 10.12.2 Unaffected: 10.11.5 Unaffected: 10.5.13 Unaffected: 11.0.4 |
Credits
daw10
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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