CVE-2025-41349 in WinPlus
Summary
by MITRE • 11/18/2025
Stored Cross-site Scripting (XSS)vylnerability type in WinPlus v24.11.27 byInformática del Este that consist of an stored XSS of a stored XSS due to a lack of proper validation of user input by sending a POST request using the 'descripcion' parameter in '/WinplusPortal/ws/sWinplus. svc/json/savesolpla_post'. This vulnerability could allow a remote user to send a specially crafted query to an authenticated user and steal their cookie session details.
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Analysis
by VulDB Data Team • 11/20/2025
The vulnerability CVE-2025-41349 represents a critical stored cross-site scripting flaw in WinPlus v24.11.27 software developed by Informática del Este. This security weakness stems from inadequate input validation mechanisms within the application's web service endpoints, specifically affecting the '/WinplusPortal/ws/sWinplus. svc/json/savesolpla_post' URI. The vulnerability manifests when user-supplied data is improperly sanitized before being stored and subsequently rendered in web pages without adequate encoding or filtering measures. The attack vector involves sending a malicious POST request that includes crafted script content within the 'descripcion' parameter, which then gets persisted in the application's database or storage system.
The technical implementation of this stored XSS vulnerability places the application squarely within CWE-79 categories, which defines cross-site scripting as a weakness where untrusted data is sent to a web browser without proper validation or encoding. The flaw occurs at the application's data processing layer where user input flows directly into the output context without appropriate sanitization. When authenticated users navigate to pages that display the stored malicious content, their browsers execute the embedded scripts within the context of their active sessions, creating a persistent threat that can affect any user who views the compromised data.
The operational impact of this vulnerability extends beyond simple data theft, as it enables attackers to hijack user sessions and potentially escalate privileges within the WinPlus application environment. Remote threat actors can craft malicious payloads that exploit the stored XSS to steal session cookies, which then allows them to impersonate legitimate users and access sensitive organizational data. This type of vulnerability creates a persistent threat vector since the malicious code remains stored in the application's backend until manually removed, making it particularly dangerous for enterprise environments where user authentication and authorization are critical. The vulnerability affects the application's integrity and confidentiality, potentially allowing unauthorized access to business-critical information managed through the WinPlus platform.
Mitigation strategies should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application's data flow. The most effective approach involves sanitizing all user-supplied input using established encoding libraries and applying context-specific output encoding before rendering any data in web contexts. Organizations should implement Content Security Policy headers to limit script execution and employ regular security scanning tools to detect similar vulnerabilities in web applications. Additionally, the application should utilize parameterized queries and input validation frameworks to prevent malicious data from being stored in the first place. Security teams should also consider implementing web application firewalls and monitoring for suspicious POST requests containing known XSS payload patterns. The remediation process should include thorough code review and penetration testing to ensure that similar vulnerabilities do not exist in other application endpoints, aligning with ATT&CK framework techniques that target web application vulnerabilities and session management weaknesses.