# CVE-2025-59826: FlagForgeCTF Vulnerable to Unauthorized Problem Creation

> Non-admin users can create arbitrary challenges, allowing malicious or misleading content injection in the FlagForgeCTF platform.

- **Severity:** High 7.6 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Sep 2025
- **Updated:** 24 Sep 2025

## What is CVE-2025-59826?

CVE-2025-59826 is a high-severity missing authorization vulnerability in FlagForgeCTF flagForge, published on 23 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

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.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2025-59826?

It affects 1 product.


Products: Flagforge Flagforge.

## How do I fix CVE-2025-59826?

No fix has been published for CVE-2025-59826 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-59826 being exploited?

There is no known exploitation of CVE-2025-59826 in the wild and no public exploit code.

## Other vulnerabilities in FlagForgeCTF flagForge

- [CVE-2025-59841](https://insights.sbomify.com/CVE-2025-59841/): FlagForgeCTF's Improper Session Handling Allows Access After Logout (critical 9.8)
- [CVE-2025-61777](https://insights.sbomify.com/CVE-2025-61777/): FlagForge Allows Unauthenticated Badge Template API Access (critical 9.4)
- [CVE-2025-59932](https://insights.sbomify.com/CVE-2025-59932/): FlagForgeCTF Unauthenticated Resource Modification/Deletion (high 8.6)
- [CVE-2025-59827](https://insights.sbomify.com/CVE-2025-59827/): FlagForgeCTF is Missing Authorization in main-v2 (high 8.2)
- [CVE-2026-21868](https://insights.sbomify.com/CVE-2026-21868/): Flag Forge has ReDoS Vulnerability in User Profile Lookup API (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-59826 and fix it if it is affected.

What it is: CVE-2025-59826 is a high-severity missing authorization vulnerability in FlagForgeCTF flagForge, published on 23 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-59826 in the wild and no public exploit code.

Affected product: FlagForgeCTF flagForge. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-59826/ (Markdown: https://insights.sbomify.com/CVE-2025-59826/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-59826
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-59826
- OSV: https://osv.dev/vulnerability/CVE-2025-59826

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-59826/
Summaries are generated and may contain mistakes; the official description above is the record.