CVE-2024-55199 in Celk Saude
Summary
by MITRE • 03/10/2025
A Stored Cross Site Scripting (XSS) vulnerability in Celk Sistemas Celk Saude v.3.1.252.1 allows a remote attacker to store JavaScript code inside a PDF file through the file upload feature. When the file is rendered, the injected code is executed on the user's browser.
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Analysis
by VulDB Data Team • 06/30/2025
The vulnerability CVE-2024-55199 represents a critical stored cross site scripting flaw within Celk Sistemas Celk Saude version 3.1.252.1, a healthcare management system that processes and stores medical documentation including PDF files. This vulnerability specifically targets the file upload functionality within the application's document handling system, creating a persistent security risk that affects all users who interact with uploaded PDF content. The flaw allows remote attackers to inject malicious JavaScript code directly into PDF files through the upload mechanism, which then executes automatically when users view these documents within the application environment.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the PDF processing pipeline. When users upload PDF files through the application interface, the system fails to properly sanitize or validate the content of these documents before storing them in the backend database. This lack of proper content filtering creates an environment where attackers can embed malicious JavaScript payloads within PDF metadata or embedded objects that will execute when the document is rendered by the application's PDF viewer component. The vulnerability is classified as stored XSS because the malicious code persists in the system's database and affects all subsequent users who access the compromised files, rather than requiring a specific user interaction to trigger the attack vector.
The operational impact of this vulnerability extends beyond simple code execution, as it enables attackers to perform a wide range of malicious activities including session hijacking, credential theft, data exfiltration, and redirection to malicious websites. Healthcare environments are particularly vulnerable to such attacks due to the sensitive nature of medical data and the potential for attackers to gain access to patient records, medical histories, and other confidential information. The attack surface is further expanded when considering that healthcare workers may unknowingly open compromised PDF files containing malware, creating potential entry points for broader network infiltration. This vulnerability directly violates security principles outlined in CWE-79, which addresses cross site scripting flaws, and aligns with ATT&CK technique T1566.001 for initial access through spearphishing attachments, making it particularly dangerous in healthcare settings where trust in medical documentation is paramount.
Organizations utilizing Celk Sistemas Celk Saude should implement immediate mitigations including comprehensive input validation for all file uploads, implementation of strict content type checking, and deployment of web application firewalls to filter malicious payloads. The system should enforce proper sanitization of PDF files before storage, utilizing dedicated PDF parsing libraries that can identify and remove potentially dangerous JavaScript code. Additionally, implementing strict access controls and user permissions for file upload functions can limit the scope of potential exploitation. Security teams should also establish monitoring procedures to detect unusual file upload patterns and implement regular security assessments to identify similar vulnerabilities in other components of the healthcare information system. The vulnerability highlights the critical importance of secure document handling in regulated environments and underscores the necessity of following industry standards such as NIST SP 800-53 for information security controls in healthcare applications.