Design/Logic Flaw

2023-09-2015:15:00

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keycloak

offline_access

session takeover

authentication

security flaw

AI Score

7.7

Confidence

High

EPSS

0.001

Percentile

37.7%

JSON

A flaw was found in the offline_access scope in Keycloak. This issue would affect users of shared computers more (especially if cookies are not cleared), due to a lack of root session validation, and the reuse of session ids across root and user authentication sessions. This enables an attacker to resolve a user session attached to a previously authenticated user; when utilizing the refresh token, they will be issued a token for the original user.