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Insufficient Session Expiration


Severity Medium
Score 6.8/10


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. The affected versions prior to 20.0.2.

  • HIGH
  • HIGH
  • NONE
  • LOW
  • HIGH
  • NONE

CWE-613 - Insufficient Session Expiration

According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization."

Advisory Timeline

  • Published