Information Disclosure in Flag Forge CTF Platform

CVE-2025-59833

What is CVE-2025-59833?

Flag Forge, a popular Capture The Flag (CTF) platform, suffers from a significant vulnerability that allows users to access challenge hints through the API endpoint GET /api/problems/:id. This security flaw exists in versions from 2.1.0 to prior to 2.3.0, where hints are returned in plaintext, exposing sensitive information irrespective of a user's progress or point deductions. This compromises the integrity of the challenge system and undermines the platform's business logic. The vulnerability has been resolved in version 2.3.0, making it essential for users to upgrade to the latest version to ensure their environments remain secure.

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