CVE-2026-30231
Description
A flaw was found in Flare, a self-hostable file sharing platform. An authenticated user, who is not the owner of a private file, can access and retrieve the content of that file by knowing its URL and using the raw and direct file routes. This is due to inconsistent access control checks compared to other endpoints, leading to unauthorized information disclosure.
Statement
This MODERATE vulnerability in Flare allows authenticated users to retrieve private files owned by others via raw and direct file routes. These endpoints only check for authentication, not ownership, creating an authorization bypass. Impact is high confidentiality loss since full file contents are exposed, but requires valid authentication and knowledge of the file URL.
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism
Access control checks for specific user data or functionality can be bypassed.
Access Control
Technical Impact: Gain Privileges or Assume Identity
Horizontal escalation of privilege is possible (one user can view/modify information of another user).
Access Control
Technical Impact: Gain Privileges or Assume Identity
Vertical escalation of privilege is possible if the user-controlled key is actually a flag that indicates administrator status, allowing the attacker to gain administrative access.
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