CVE-2024-28126 in 0ch BBS Script
Summary
by MITRE • 03/26/2024
Cross-site scripting vulnerability exists in 0ch BBS Script ver.4.00. An arbitrary script may be executed on the web browser of the user accessing the website that uses the product. Note that the developer was unreachable, therefore, users should consider stop using 0ch BBS Script ver.4.00.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 04/13/2025
The CVE-2024-28126 vulnerability represents a critical cross-site scripting flaw in the 0ch BBS Script version 4.00, fundamentally compromising the security posture of affected web applications. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security flaws. The 0ch BBS Script is a bulletin board system designed for anonymous posting and discussion forums, making it particularly susceptible to malicious exploitation due to its user interaction patterns and lack of proper input sanitization mechanisms.
The technical flaw manifests when the application fails to adequately validate or escape user-supplied input before rendering it within web pages. This omission allows attackers to inject malicious JavaScript code into the application's output, which then executes in the context of other users' browsers who visit affected pages. The vulnerability specifically affects the version 4.00 of the 0ch BBS Script, indicating that this flaw has been present in the codebase for some time, potentially allowing attackers to develop and deploy exploitation techniques without detection. The nature of bulletin board systems means that user-generated content is frequently displayed without sufficient sanitization, creating multiple entry points for XSS attacks.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform a wide range of malicious activities through the compromised user sessions. An attacker could steal session cookies, redirect users to phishing sites, deface the bulletin board, or even execute commands on the affected server if additional vulnerabilities exist. The attack surface is particularly concerning given that 0ch BBS Script is designed for anonymous posting, meaning that attackers could exploit the vulnerability without requiring authentication or specific user credentials. This makes the vulnerability especially dangerous in environments where the script is used for public discussion forums or community platforms where user trust is paramount.
Security professionals should consider this vulnerability in the context of the ATT&CK framework, specifically under the T1059.007 technique for "Command and Scripting Interpreter: JavaScript" and T1566.001 for "Phishing: Spearphishing Attachment". The lack of input validation in version 4.00 creates a persistent threat vector that aligns with the broader category of application-level attacks targeting web interfaces. The fact that the developer was unreachable significantly compounds the security risk, as users cannot rely on official patches or updates to address the vulnerability. Organizations and individuals using this script should immediately implement mitigations including input validation at the application level, output encoding, and the implementation of Content Security Policies to prevent unauthorized script execution. The vulnerability also highlights the importance of maintaining up-to-date security practices and the dangers of relying on unsupported software versions in production environments.