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OpenAdvisories
High · 7.5 CVE-2025-59833 EUVD-2025-31050

FlagForgeCTF Hint Exposure via API

Published Sep 24, 2025 · Updated Sep 24, 2025 · Assigned by GitHub_M

Description

Flag Forge is a Capture The Flag (CTF) platform. In versions from 2.1.0 to before 2.3.0, the API endpoint GET /api/problems/:id returns challenge hints in plaintext within the question object, regardless of whether the user has unlocked them via point deduction. Users can view all hints for free, undermining the business logic of the platform and reducing the integrity of the challenge system. This issue has been patched in version 2.3.0.

Affected products

VendorProductAffectedFixed
FlagForgeCTF flagForge >= 2.1.0, < 2.3.0 —

References