CVE-2025-59833 FlagForgeCTF Hint Exposure via API
Attackers can view all challenge hints for free via the API, bypassing point deduction requirements and undermining the CTF platform's integrity.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-59833?
CVE-2025-59833 is a high-severity vulnerability in FlagForgeCTF flagForge, published on 24 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-200
Which versions are affected by CVE-2025-59833?
It affects 1 product.
Products include Flagforge Flagforge.
How do I fix CVE-2025-59833?
No fix has been published for CVE-2025-59833 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-59833 being exploited?
There is no known exploitation of CVE-2025-59833 in the wild and no public exploit code.
Other vulnerabilities in FlagForgeCTF flagForge
- CVE-2025-59841 FlagForgeCTF's Improper Session Handling Allows Access After Logout
- CVE-2025-61777 FlagForge Allows Unauthenticated Badge Template API Access
- CVE-2025-59932 FlagForgeCTF Unauthenticated Resource Modification/Deletion
- CVE-2025-59827 FlagForgeCTF is Missing Authorization in main-v2
- CVE-2025-59826 FlagForgeCTF Vulnerable to Unauthorized Problem Creation
Sources
Also known as GHSA-hm85-2j65-j8j2.