CVE-2025-4376 in Pro Cloud Server
Summary
by MITRE • 05/09/2025
Improper Input Validation vulnerability in Sparx Systems Pro Cloud Server's WebEA model search field allows Cross-Site Scripting (XSS). This issue affects Pro Cloud Server: earlier than 6.0.165.
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Analysis
by VulDB Data Team • 05/09/2025
The vulnerability identified as CVE-2025-4376 represents a critical security flaw in Sparx Systems Pro Cloud Server's WebEA model search functionality that enables unauthorized execution of malicious scripts within the context of a user's browser session. This improper input validation weakness specifically targets the search field component of the WebEA interface, creating a pathway for attackers to inject and execute cross-site scripting payloads that can compromise user sessions and data integrity. The vulnerability exists in versions prior to 6.0.165 of the Pro Cloud Server software, indicating that organizations running older releases remain exposed to potential exploitation attempts.
The technical implementation of this vulnerability stems from inadequate sanitization and validation of user input within the search field parameter. When users submit search queries through the WebEA model interface, the application fails to properly validate or escape the input data before processing or displaying it back to the user. This allows malicious actors to craft search terms containing script tags or other malicious code that executes in the browser context of legitimate users who view the search results. The flaw aligns with CWE-79, which specifically addresses cross-site scripting vulnerabilities arising from insufficient input validation and output encoding. This weakness creates a persistent threat vector where attackers can leverage the search functionality to inject malicious payloads that persist across user sessions and potentially escalate to more severe security compromises.
The operational impact of CVE-2025-4376 extends beyond simple script execution, as it enables attackers to perform session hijacking, data exfiltration, and potentially gain unauthorized access to sensitive model information stored within the Pro Cloud Server environment. An attacker could craft search queries that, when executed by other users, would steal authentication cookies, redirect users to malicious sites, or inject additional malicious code into the application interface. This vulnerability directly maps to ATT&CK technique T1566.001, which covers the exploitation of web application vulnerabilities for initial access and privilege escalation. The compromised search functionality could allow attackers to manipulate the WebEA interface to gain unauthorized access to other users' projects, model data, or even administrative functions depending on the privilege levels of the affected users.
Organizations utilizing Sparx Systems Pro Cloud Server should prioritize immediate remediation by upgrading to version 6.0.165 or later, which contains the necessary patches to address the input validation shortcomings. Additionally, implementing comprehensive input sanitization measures, output encoding, and regular security testing of web application components can significantly reduce the risk of exploitation. Security teams should conduct thorough vulnerability assessments of their WebEA implementations and monitor for potential exploitation attempts through anomalous search activity patterns. The remediation process should include validating that all user inputs are properly escaped and validated before processing, implementing Content Security Policies to mitigate the impact of potential XSS attacks, and establishing regular security updates for all components within the Pro Cloud Server environment to prevent similar vulnerabilities from emerging in the future.