Language: Python
Label: vulnerable
CWE: CWE-613 \u2014 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."

Code:
def is_authenticated(session=flask.session):
    return session.get("name") and session.get(
        "authenticated"
    )  # NOTE: why checks name?