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CVE-2025-29459: Information Disclosure Vulnerability in MyBB 1.8.38

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Overview

The vulnerability in question, identified as CVE-2025-29459, has been detected in the MyBB 1.8.38 forum software. This vulnerability can potentially allow a remote attacker to gain access to sensitive information through the Mail function. This issue is significant as it can lead to a system compromise or data leakage if successfully exploited, posing a serious threat to the security of the products and systems that use this software.

Vulnerability Summary

CVE ID: CVE-2025-29459
Severity: High, CVSS Severity Score: 7.6
Attack Vector: Network
Privileges Required: None
User Interaction: Required
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 lies within the Mail function of the MyBB 1.8.38 software. A remote attacker can exploit this by sending a specially crafted email that triggers the vulnerability, thus granting them access to sensitive information. This information could be used for further attacks or to cause harm to the running systems.

Conceptual Example Code

The following is a hypothetical example of how the vulnerability might be exploited. This is a conceptual email that carries a malicious payload:

POST /MailFunction HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "malicious_payload": "specially_crafted_email_content" }

Mitigation Measures

To mitigate this vulnerability, users of the affected software are advised to apply the patch provided by the vendor. As a temporary measure, Web Applications Firewalls (WAF) or Intrusion Detection Systems (IDS) can be employed to detect and prevent potential exploit attempts.

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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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