Flame through 2.4.0 contains an insufficient session expiration vulnerability in the login endpoint that allows attackers with former admin access to obtain tokens with arbitrary lifespans by supplying unvalidated duration parameters. Attackers can mint near-permanent administrator tokens that survive password changes, retaining full control of the dashboard since tokens are verified only against a static JWT secret that is never rotated.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 6
https://github.com/pawelmalak/flame
disclosure@vulncheck.com
https://github.com/pawelmalak/flame/blob/v2.4.0/controllers/auth/login.js#L9-L17
disclosure@vulncheck.com
https://github.com/pawelmalak/flame/blob/v2.4.0/utils/init/initSecret.js#L8-L25
disclosure@vulncheck.com
https://github.com/pawelmalak/flame/blob/v2.4.0/utils/signToken.js#L4
disclosure@vulncheck.com
https://github.com/pawelmalak/flame/issues/494
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/flame-through-2.4.0-admin-token-insufficie…
disclosure@vulncheck.com