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CVE-2025-6710: Stack Overflow Vulnerability in MongoDB Server due to JSON Parsing

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Overview

CVE-2025-6710 is a serious vulnerability that affects multiple versions of MongoDB Server. This vulnerability can potentially lead to system compromises or data leaks due to an issue with the JSON parsing mechanism that makes the server susceptible to stack overflow attacks. This vulnerability is especially critical as it could lead to server crashes and can occur even before authorisation.

Vulnerability Summary

CVE ID: CVE-2025-6710
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: Low (No authentication needed for v7.0 and v8.0, authentication required for v6.0)
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

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Product | Affected Versions

MongoDB Server | v7.0 prior to 7.0.17
MongoDB Server | v8.0 prior to 8.0.5
MongoDB Server | v6.0 prior to 6.0.21

How the Exploit Works

The exploit works by sending specially crafted JSON inputs to the MongoDB Server. These inputs cause unwarranted levels of recursion in the JSON parsing mechanism, resulting in excessive stack space consumption. This can lead to a stack overflow that causes the server to crash. For v6.0 versions, an attacker would need to authenticate first to induce this denial of service.

Conceptual Example Code

This is a conceptual example of how the exploit might be conducted in a HTTP request:

POST /mongodb_endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "malicious_json": "{...deeply nested recursive elements...}" }

In this example, the “malicious_json” would contain deeply nested recursive elements that when parsed by the MongoDB Server, would lead to a stack overflow and potential server crash.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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