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CVE-2025-29460: MyBB 1.8.38 Remote Information Disclosure Vulnerability

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Overview

This report presents a detailed analysis of CVE-2025-29460, a vulnerability discovered in MyBB 1.8.38. The security flaw enables a remote attacker to procure sensitive information through the Add Mycode function. Organizations that utilize MyBB 1.8.38 are expose to potential system compromise or data leakage; therefore, understanding this vulnerability and implementing appropriate mitigation measures is of utmost importance.

Vulnerability Summary

CVE ID: CVE-2025-29460
Severity: High (7.6 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

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Product | Affected Versions

MyBB | 1.8.38

How the Exploit Works

The vulnerability works by exploiting the Add Mycode function in MyBB 1.8.38. A remote attacker sends a specially crafted request to this function, which in turn, responds with sensitive information. This information could potentially be used to perform a more extensive attack, leading to system compromise or data leakage.

Conceptual Example Code

Below is a conceptual example of how the vulnerability might be exploited. This example shows a malicious HTTP request sent to the vulnerable endpoint.

POST /addmycode HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "malicious_payload": "retrieve_sensitive_data()" }

Mitigation Guidance

The most effective mitigation against this vulnerability is to apply the vendor-provided patch. In cases where this is not immediately possible, deploying a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. It is advisable for organizations to regularly update their MyBB software to the latest version to prevent exploitation of such vulnerabilities.

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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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