Overview
Today, we delve into a significant vulnerability found in Flag Forge, a popular Capture The Flag (CTF) platform. This vulnerability, designated as CVE-2025-59932, affects versions 2.0.0 to 2.3.0 of the software, potentially exposing unauthorized users to system resources. As a cybersecurity expert, it is imperative to understand the implications of such a vulnerability, given its potential to compromise systems or lead to data leakage.
The significance of this vulnerability lies in the fact that Flag Forge is extensively used by various organizations for cybersecurity training and competitions. Any security weakness in the platform could provide malicious users with an opportunity to manipulate the system or access sensitive information, thereby undermining the integrity and credibility of the platform.
Vulnerability Summary
CVE ID: CVE-2025-59932
Severity: Critical (CVSS: 8.6)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
Escape the Surveillance Era
Most apps won’t tell you the truth.
They’re part of the problem.
Phone numbers. Emails. Profiles. Logs.
It’s all fuel for surveillance.
Ameeba Chat gives you a way out.
- • No phone number
- • No email
- • No personal info
- • Anonymous aliases
- • End-to-end encrypted
Chat without a trace.
Product | Affected Versions
Flag Forge | 2.0.0 to 2.3.0
How the Exploit Works
The vulnerability stems from a flaw in the /api/resources endpoint of the Flag Forge platform. This endpoint was found to allow POST and DELETE requests without the need for proper authentication or authorization. Therefore, a malicious user could send unauthenticated POST or DELETE requests to this endpoint to create, modify, or delete resources on the platform.
Conceptual Example Code
Here’s a conceptual example of how this vulnerability could be exploited. This is a sample HTTP POST request to the /api/resources endpoint:
POST /api/resources HTTP/1.1
Host: flagforge.example.com
Content-Type: application/json
{
"resource_id": "123",
"resource_name": "Fake Resource",
"resource_data": "Malicious data..."
}And here’s a sample HTTP DELETE request:
DELETE /api/resources/123 HTTP/1.1
Host: flagforge.example.comNote that both requests are made without any form of authentication, yet they can potentially create or delete resources on the platform.
Mitigation
To mitigate this vulnerability, it is recommended to apply the vendor-provided patch by upgrading to Flag Forge version 2.3.1. For temporary mitigation, usage of Web Application Firewalls (WAF) or Intrusion Detection Systems (IDS) can help detect and block malicious requests targeting the vulnerable endpoint.
