File Browser before v2.63.22 fails to validate access rules for descendants during recursive copy, rename, and delete operations, allowing authenticated users to bypass path-based access controls. Attackers can copy, rename, or delete denied files by operating on their allowed parent directory, defeating rule-based isolation for confidentiality and integrity.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 3
https://github.com/filebrowser/filebrowser/commit/72faf6dd3c85628e332d3e567124b…
disclosure@vulncheck.com
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-77x8-73f4-5…
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/file-browser-before-authorization-bypass-v…
disclosure@vulncheck.com