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FlagforgeApplication

CVE-2025-59826

HIGH · 7.6 CVSS v3.1 Published 2025-09-23
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
82/100
Remediation priority · High
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Flag Forge is a Capture The Flag (CTF) platform. In version 2.1.0, non-admin users can create arbitrary challenges, potentially introducing malicious, incorrect, or misleading content. This issue has been patched in version 2.2.0.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Flag Forge 2.1.0 has a privilege escalation vulnerability where non-admin users can create arbitrary challenges due to missing or insufficient authorization checks. This allows any authenticated user to inject potentially malicious, incorrect, or misleading challenge content into the CTF platform.

MitigationUpgrade to Flag Forge version 2.2.0 which contains the security patch. Prior to upgrade, review existing challenge content for any suspicious submissions from non-admin users.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
FlagforgeApplication
Affected:= 2.1.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify installed Flag Forge version
    Locate the Flag Forge installation and check the version number reported by the application or its package metadata
    Affected if The installed version is exactly 2.1.0
  2. Verify if non-admin user accounts exist
    Check the user management system to confirm the presence of non-admin authenticated users in the platform
    Affected if Non-admin user accounts are present in the system
  3. Confirm challenge creation is accessible to non-admins
    Test or inspect the challenge creation functionality to determine if it permits submissions from users without administrator privileges
    Affected if Non-admin users can access or use the challenge creation feature without admin-level authorization checks
  4. Review existing challenge submissions
    Examine the challenge database or content management system for entries created by non-administrator accounts
    Affected if Challenges authored by non-admin users exist in the system, which would indicate the vulnerability has been exploited or is present
  5. Audit authorization controls on challenge endpoints
    Inspect the API or web routes handling challenge creation to verify whether authorization middleware properly restricts access to admin roles only
    Affected if Authorization controls are missing or insufficient on challenge creation endpoints

A user is affected if Flag Forge version 2.1.0 is running and non-administrator accounts can create or submit challenges without proper authorization checks.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Upgrade to Flag Forge version 2.2.0 which contains the security patch. Prior to upgrade, review existing challenge content for any suspicious submissions from non-admin users.

Recommended fix High confidence

2.2.0

  1. Review the Flagforge upgrade documentation for your deployment method
  2. Backup your current Flagforge 2.1.0 instance including configuration and database
  3. Upgrade Flagforge from version 2.1.0 to version 2.2.0 using your installation method (e.g., package manager, Docker, or manual update)
  4. After upgrading, verify that the authorization fix is applied by confirming non-admin users can no longer create arbitrary challenges
  5. Test that existing functionality continues to work as expected

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Flagforge Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing4.0 h
  • Review / QA2.0 h
10.0 hours of engineering $1,720
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An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,752.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-59826 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data