CVE-2025-12421
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Account Takeover via Code Exchange Endpoint
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to to verify that the token used during the code exchange originates from the same authentication flow, which allows an authenticated user to perform account takeover via a specially crafted email address used when switching authentication methods and sending a request to the /users/login/sso/code-exchange endpoint. The vulnerability requires ExperimentalEnableAuthenticationTransfer to be enabled (default: enabled) and RequireEmailVerification to be disabled (default: disabled).
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Mattermost
- Vendor
- Mattermost
- Product
- Mattermost
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 11.0.0 | affected | semver | Unavailable | 11.0.2 | None listed |
| 10.12.0 | affected | semver | Unavailable | 10.12.1 | None listed |
| 10.11.0 | affected | semver | Unavailable | 10.11.4 | None listed |
| 10.5.0 | affected | semver | Unavailable | 10.5.12 | None listed |
| 11.1.0 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 11.0.3 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 10.12.2 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 10.11.5 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 10.5.13 | unaffected | Unavailable | Unavailable | Unavailable | None listed |