CVE-2025-6453 in bbs
Summary
by MITRE • 06/22/2025
A vulnerability classified as critical has been found in diyhi bbs 6.8. Affected is the function Add of the file /src/main/java/cms/web/action/template/ForumManageAction.java of the component API. The manipulation of the argument dirName leads to path traversal. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 09/04/2025
This critical vulnerability in diyhi bbs 6.8 represents a path traversal flaw that resides within the ForumManageAction.java file at the /src/main/java/cms/web/action/template/ directory. The vulnerability specifically affects the Add function where the dirName parameter is processed without adequate validation or sanitization. This allows attackers to manipulate the directory path through the dirName argument, potentially enabling them to access arbitrary files on the server filesystem. The vulnerability's classification as critical indicates the severe impact it can have on system security and data integrity.
The technical nature of this flaw aligns with CWE-22 Path Traversal vulnerabilities, which occur when applications fail to properly validate user input before using it in file system operations. In this case, the dirName parameter likely gets directly incorporated into file system paths without proper sanitization, allowing attackers to use directory traversal sequences such as "../" to navigate outside of intended directories. This type of vulnerability is particularly dangerous because it can be exploited remotely, meaning an attacker does not need physical access to the system to exploit it. The fact that a public exploit has been disclosed further amplifies the risk, as malicious actors can immediately leverage this knowledge to compromise affected systems.
The operational impact of this vulnerability extends beyond simple unauthorized file access. An attacker could potentially read sensitive configuration files, database credentials, application source code, or other confidential information stored on the server. The remote exploitation capability means that attackers can target vulnerable systems from anywhere on the internet, making this vulnerability particularly attractive to threat actors. Additionally, this vulnerability could serve as a stepping stone for more sophisticated attacks, potentially allowing attackers to execute arbitrary code or escalate privileges within the affected system. The API component's exposure through the ForumManageAction.java file suggests that this vulnerability could impact not just the web interface but also the underlying application programming interface that other systems might rely upon.
Organizations running diyhi bbs 6.8 should immediately implement mitigations to address this vulnerability. The most effective approach involves input validation and sanitization of the dirName parameter, ensuring that all user-supplied directory names are properly validated against a whitelist of acceptable values. Implementing proper path normalization and using secure file system APIs that prevent directory traversal attacks should be prioritized. Additionally, restricting file system access permissions for the application and implementing network-level protections such as firewalls and web application firewalls can provide additional defense-in-depth measures. The vulnerability's public disclosure status necessitates immediate action, as automated scanning tools and exploit kits are likely already targeting systems with this specific vulnerability. Regular security assessments and vulnerability management processes should be enhanced to prevent similar issues in the future, particularly focusing on input validation for file system operations. Organizations should also consider implementing monitoring and alerting mechanisms to detect potential exploitation attempts against this vulnerability.