CVE-2025-25476 in SysPass
Summary
by MITRE • 03/01/2025
A stored cross-site scripting (XSS) vulnerability in SysPass 3.2.x allows a malicious user with elevated privileges to execute arbitrary Javascript code by specifying a malicious XSS payload as a notification type or notification component.
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Analysis
by VulDB Data Team • 07/10/2025
This vulnerability exists within SysPass version 3.2.x, a password management application that handles sensitive credential information for organizations. The stored cross-site scripting flaw represents a critical security weakness that enables attackers with elevated privileges to inject malicious javascript code into the application's notification system. The vulnerability specifically affects the notification type and notification component fields where user input is not properly sanitized or validated before being stored and subsequently rendered to other users. This allows a malicious actor with sufficient privileges to craft and inject javascript payloads that will execute in the context of other users' browsers when they view affected notifications. The stored nature of this vulnerability means that the malicious code persists in the application's database and can affect multiple users over time rather than requiring repeated exploitation attempts.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding mechanisms within the notification handling components of SysPass. When administrators or privileged users create notifications using the application's interface, the system fails to properly sanitize user-supplied data before storing it in the database. This creates an environment where malicious payloads can be embedded within notification text fields and then executed whenever legitimate users access the notification system. The vulnerability is particularly dangerous because it requires only elevated privileges to exploit, meaning that attackers who have already gained administrative access or compromised privileged accounts can leverage this weakness to escalate their attack capabilities. According to CWE classification, this represents a CWE-79: Cross-site Scripting vulnerability, specifically a stored XSS variant where the malicious script is stored on the server and executed when other users access the affected content. The ATT&CK framework categorizes this as a technique for code injection within the execution phase, potentially enabling further lateral movement or privilege escalation within the compromised environment.
The operational impact of this vulnerability extends beyond simple script execution as it provides attackers with a persistent means of maintaining access and conducting further malicious activities within the compromised system. Once exploited, the injected javascript code can perform various malicious functions including stealing session cookies, redirecting users to phishing sites, modifying application functionality, or exfiltrating sensitive data from the password management system. The vulnerability's potential for widespread impact increases significantly because the notification system is typically used by multiple users within an organization, meaning that a single malicious payload can affect numerous individuals. Organizations relying on SysPass for credential management face elevated risk of credential theft, unauthorized access to sensitive systems, and potential data breaches. The attack vector is particularly concerning for environments where SysPass serves as a central password management solution, as it could enable attackers to gain access to critical organizational credentials and potentially compromise entire network infrastructures.
Mitigation strategies for this vulnerability should focus on immediate implementation of proper input validation and output encoding mechanisms throughout the notification handling components. Organizations should implement strict sanitization of all user-supplied input before storage, employ context-specific output encoding for rendered content, and consider implementing content security policies to prevent unauthorized script execution. The most effective immediate solution involves upgrading to a patched version of SysPass that addresses the stored XSS vulnerability, as this removes the root cause of the weakness. Additionally, organizations should implement network segmentation and access controls to limit the scope of potential exploitation, ensuring that privileged accounts have appropriate least-privilege access. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities within the application's codebase, while user education programs can help reduce the risk of privilege escalation attacks. The implementation of web application firewalls and intrusion detection systems can provide additional layers of protection against exploitation attempts, and regular monitoring of notification system access logs can help identify potential malicious activity. Organizations should also consider implementing multi-factor authentication for privileged accounts and conducting regular security assessments to ensure that similar vulnerabilities are not present in other components of their password management infrastructure.