CVE-2025-63243 in WebLaudos
Summary
by MITRE • 11/19/2025
A reflected cross-site scripting (XSS) vulnerability exists in the password change functionality of Pixeon WebLaudos 25.1 (01). The sle_sSenha parameter to the loginAlterarSenha.asp file. An attacker can craft a malicious URL that, when visited by a victim, causes arbitrary JavaScript code to be executed in the victim's browser within the security context of the vulnerable application. This issue could allow attackers to steal session cookies, disclose sensitive information, perform unauthorized actions on behalf of the user, or conduct phishing attacks.
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Analysis
by VulDB Data Team • 01/12/2026
The vulnerability identified as CVE-2025-63243 represents a critical reflected cross-site scripting flaw within Pixeon WebLaudos version 25.1 (01) that specifically targets the password change functionality. This vulnerability manifests through the sle_sSenha parameter within the loginAlterarSenha.asp file, creating an attack vector that allows malicious actors to inject and execute arbitrary JavaScript code within the victim's browser context. The reflected nature of this XSS vulnerability means that the malicious payload is reflected back to the user through the application's response, making it particularly dangerous as it requires no persistent storage of the malicious code within the application itself. The vulnerability resides in the application's insufficient input validation and output encoding mechanisms, which fail to properly sanitize user-supplied parameters before incorporating them into dynamic web content.
The technical exploitation of this vulnerability follows established patterns consistent with CWE-79 - Improper Neutralization of Input During Web Page Generation, where the application fails to adequately escape or encode user-controllable data before rendering it in web responses. Attackers can craft malicious URLs containing specially formatted JavaScript payloads that, when executed in a victim's browser, operate within the security context of the legitimate application. This contextual execution enables attackers to perform a wide range of malicious activities including session hijacking through cookie theft, data exfiltration, and unauthorized modification of application state. The vulnerability's impact extends beyond simple information disclosure as it provides attackers with the ability to impersonate users and perform actions with their privileges, making it particularly dangerous in healthcare environments where Pixeon WebLaudos is typically deployed for medical documentation and patient data management.
The operational impact of this vulnerability creates significant security risks for organizations utilizing Pixeon WebLaudos, as it can be leveraged to establish persistent unauthorized access to sensitive medical information. The reflected nature of the vulnerability means that attackers can deliver payloads through phishing emails, compromised websites, or social engineering campaigns without requiring access to the application's backend systems. This makes the attack surface particularly broad and difficult to monitor effectively. Security practitioners should note that the vulnerability aligns with several tactics described in the MITRE ATT&CK framework under T1566 - Phishing and T1071.1 - Application Layer Protocol: Web Protocols, as attackers can leverage this flaw to deliver malicious payloads through web-based attack vectors. The potential for session manipulation and credential theft makes this vulnerability particularly attractive to threat actors targeting healthcare organizations, where patient data confidentiality and integrity are paramount. Organizations should also consider the cascading effects of such vulnerabilities, as successful exploitation could lead to further compromise of the broader network infrastructure through lateral movement.
Mitigation strategies for CVE-2025-63243 should prioritize immediate implementation of input validation and output encoding controls to prevent user-supplied data from being executed as JavaScript code. The most effective remediation involves implementing proper parameter sanitization within the loginAlterarSenha.asp file, ensuring that all user inputs are properly escaped before being rendered in web responses. Organizations should also consider implementing Content Security Policy (CSP) headers to add an additional layer of protection against XSS attacks, though this should not be considered a substitute for proper input validation. Regular security testing including dynamic application security testing (DAST) and manual penetration testing should be conducted to identify similar vulnerabilities in other application components. The vulnerability demonstrates the importance of following secure coding practices as outlined in OWASP Top Ten and NIST cybersecurity guidelines, emphasizing the need for comprehensive input validation, output encoding, and defense-in-depth strategies to protect against web-based attacks. Additionally, user education regarding phishing awareness and suspicious URL handling should be implemented as part of a broader security awareness program to reduce the likelihood of successful exploitation attempts.