HoloViz Panel from 1.2.2 before 1.9.0 contains an open redirect vulnerability in panel/auth.py that allows remote attackers to redirect users by supplying an unvalidated next query parameter. BasicLoginHandler and PasswordLoginHandler store the parameter in a next_url cookie, so crafted login links send victims to attacker-controlled external sites after successful login.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Active
User action required
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 5
https://github.com/holoviz/panel
disclosure@vulncheck.com
https://github.com/holoviz/panel/blob/v1.8.10/panel/auth.py#L866-L900
disclosure@vulncheck.com
https://github.com/holoviz/panel/commit/a6a8b2cb9592a014cf6a7b0d3d5fc9cbf59bb2ed
disclosure@vulncheck.com
https://github.com/holoviz/panel/issues/6782
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/holoviz-panel-from-1.2.2-before-1.9.0-open…
disclosure@vulncheck.com