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CVE-2025-12421

Account Takeover via Code Exchange Endpoint PUBLISHED

Description (CNA)

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).

Affected (CNA)

Vendor / productVersions
Mattermost / Mattermostaffected 11.0.0 through 11.0.2; affected 10.12.0 through 10.12.1; affected 10.11.0 through 10.11.4; affected 10.5.0 through 10.5.12; unaffected 11.1.0; unaffected 11.0.3; unaffected 10.12.2; unaffected 10.11.5; unaffected 10.5.13

CWE

CWE-303

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.