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CVE-2025-6713: MongoDB Server Unauthorized Data Access Vulnerability

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Overview

This report examines CVE-2025-6713, a significant vulnerability in MongoDB Server that allows unauthorized data access. MongoDB Server users, particularly those using versions v8.0 prior to 8.0.7, v7.0 prior to 7.0.20, and v6.0 prior to 6.0.22, are affected by this vulnerability. It is crucial to address this issue as it can potentially lead to system compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2025-6713
Severity: High (CVSS 7.7)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Unauthorized access to data, potential system compromise or data leakage

Affected Products

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Product | Affected Versions

MongoDB Server | v8.0 prior to 8.0.7
MongoDB Server | v7.0 prior to 7.0.20
MongoDB Server | v6.0 prior to 6.0.22

How the Exploit Works

An attacker can exploit this vulnerability by creating a specially crafted aggregation pipeline. The $mergeCursors stage in MongoDB Server improperly handles this pipeline, allowing the attacker to bypass authorization checks and gain unauthorized access to data.

Conceptual Example Code

Here is a conceptual example of how the vulnerability might be exploited. The attacker sends a specially crafted HTTP request to the vulnerable MongoDB Server:

POST /vulnerable/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"aggregation_pipeline":
{
"$mergeCursors":
{
"source": "unauthorized_data_collection",
"options":
{
"pipeline": [
{"$match": {"_id": "target_record_id"}},
{"$project": {"sensitive_field": 1}}
]
}
}
}
}

In this example, the attacker targets a specific record (“target_record_id”) in an unauthorized data collection (“unauthorized_data_collection”) and extracts a sensitive field (“sensitive_field”).

Mitigation Guidance

To mitigate this vulnerability, users are advised to apply the vendor patch. For MongoDB Server v8.0, upgrade to version 8.0.7 or later. For MongoDB Server v7.0, upgrade to version 7.0.20 or later. For MongoDB Server v6.0, upgrade to version 6.0.22 or later. As a temporary mitigation measure, users can also implement a Web Application Firewall (WAF) or Intrusion Detection System (IDS).

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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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