Authlib is a Python library which builds OAuth and OpenID Connect servers. In version 1.6.5 and prior, cache-backed state/request-token storage is not tied to the initiating user session, so CSRF is possible for any attacker that has a valid state (easily obtainable via an attacker-initiated authentication flow). When a cache is supplied to the OAuth client registry, FrameworkIntegration.set_state_data writes the entire state blob under state{app}_{state}, and get_state_data ignores the caller’s session altogether. This issue has been patched in version 1.6.6.
0.15.4-10.15.4-1+deb11u10.15.4-20.15.5-11.0.0-11.0.1-11.1.0-11.1.0-21.2.0-11.2.1-1+17 more1.2.0-11.2.1-11.3.0-11.3.0-21.3.0-31.3.1-11.3.2-11.3.2-21.4.0-11.4.1-1+9 more1.6.0-11.6.1-11.6.3-11.6.4-11.6.5-11.6.6-11.6.6-1Exploitability
AV:NAC:LPR:LUI:RScope
S:UImpact
C:HI:NA:NCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N