CVE-2025-3789 in JSite
Summary
by MITRE • 04/18/2025
A vulnerability was found in baseweb JSite 1.0. It has been rated as problematic. Affected by this issue is some unknown functionality of the file /a/sys/area/save. The manipulation of the argument Name leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 10/16/2025
The vulnerability identified as CVE-2025-3789 affects baseweb JSite version 1.0 and represents a cross site scripting vulnerability within the system's administrative functionality. This issue resides in the /a/sys/area/save endpoint where improper input validation allows malicious actors to inject malicious scripts through the Name parameter. The vulnerability has been classified as problematic due to its potential for remote exploitation and the public disclosure of exploitation methods. The attack vector requires no special privileges or access conditions, making it particularly dangerous as it can be executed from any location with network access to the vulnerable system. The affected functionality specifically relates to the system's area management capabilities, which are likely used for content organization and administrative tasks within the baseweb JSite framework.
The technical flaw stems from insufficient sanitization of user-supplied input within the Name argument processing within the save endpoint. When an attacker submits malicious input through this parameter, the application fails to properly validate or escape the data before processing or storing it within the system. This lack of input validation creates an opportunity for attackers to inject malicious JavaScript code that will execute in the context of other users' browsers when they interact with the affected system. The vulnerability manifests as a classic cross site scripting flaw where the injected scripts can steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users. This type of vulnerability directly maps to CWE-79 which defines cross site scripting as the failure to properly neutralize user input data when it is used in dynamic content generation.
The operational impact of this vulnerability extends beyond simple script execution as it compromises the integrity and confidentiality of the entire baseweb JSite installation. An attacker who successfully exploits this vulnerability can potentially escalate privileges, access sensitive administrative functions, or steal user credentials through session hijacking. The remote exploitation capability means that attackers do not need physical access to the network or system, allowing for widespread impact from any internet-connected location. The public disclosure of the exploit increases the likelihood of automated attacks targeting systems running vulnerable versions of baseweb JSite. This vulnerability also creates potential for persistent threats where attackers can establish backdoors through the injected scripts, making long-term compromise of affected systems possible.
Organizations should immediately implement multiple layers of defense to protect against exploitation of CVE-2025-3789. The primary mitigation involves applying input validation and output encoding to all user-supplied data, particularly within the affected save endpoint. Implementing proper content security policies and using secure coding practices such as parameterized queries and strict input sanitization can prevent the execution of malicious scripts. Network segmentation and web application firewalls should be configured to monitor and block suspicious requests to the vulnerable endpoint. Additionally, regular security assessments and penetration testing should be conducted to identify similar vulnerabilities within the broader system architecture. The ATT&CK framework categorizes this vulnerability under T1059.007 for scripting and T1566.001 for spearphishing, indicating the need for both defensive measures against code execution and user awareness training. System administrators should also implement proper access controls and monitoring to detect unauthorized access attempts to administrative functions, as the vulnerability could enable privilege escalation if attackers gain access to administrative accounts through session hijacking or credential theft.