Penpot is an open-source design and prototyping platform. Prior to 2.18.0, logout clears the browsers auth-token cookie without revoking the corresponding server-side session. A previously captured session token remains usable after the victim logs out and can continue to make authenticated requests with the victims authority until natural expiration. This issue is fixed in version 2.18.0.
Weakness
According to WASC, “Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.”