CVE-2022-1730 in drawio
Summary
by MITRE • 05/19/2022
Cross-site Scripting (XSS) - Stored in GitHub repository jgraph/drawio prior to 18.0.4.
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Analysis
by VulDB Data Team • 05/26/2022
The vulnerability identified as CVE-2022-1730 represents a stored cross-site scripting flaw within the jgraph/drawio repository, a widely used diagramming application that allows users to create and edit visual diagrams through web-based interfaces. This vulnerability specifically affects versions prior to 18.0.4, indicating that the security issue was present in the application's codebase before this particular release. The flaw manifests in the application's handling of user input data, where malicious scripts can be injected and subsequently stored within the application's database or storage mechanisms. This type of vulnerability falls under the category of persistent XSS attacks, where the malicious payload remains embedded in the system and can affect multiple users who interact with the compromised data. The vulnerability has significant implications for organizations that rely on drawio for collaborative diagramming, as it could enable attackers to execute arbitrary JavaScript code within the context of other users' browsers. The issue stems from inadequate input validation and output encoding mechanisms within the application's data processing pipeline, allowing untrusted data to be rendered without proper sanitization.
The technical exploitation of this vulnerability occurs when an attacker crafts malicious input containing JavaScript code and submits it through the application's interface. This input is then stored in the system's backend storage, where it remains dormant until another user accesses the affected content. When the compromised data is rendered in a user's browser, the stored script executes automatically, potentially stealing session cookies, redirecting users to malicious sites, or performing other harmful actions. The vulnerability is classified as a CWE-79 (Cross-site Scripting) with specific characteristics matching CWE-80 (Improper Neutralization of Script-Related HTML Tags in a Web Page) and CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). The ATT&CK framework categorizes this as a web application attack vector under T1566 (Phishing) and T1059 (Command and Scripting Interpreter) where the initial compromise leads to persistent code execution. The flaw demonstrates a fundamental weakness in the application's security architecture, particularly in its data sanitization and validation processes.
The operational impact of CVE-2022-1730 extends beyond simple script execution, as it can enable attackers to establish persistent access to user sessions and potentially escalate privileges within the application environment. Organizations using drawio for collaborative work may experience unauthorized access to sensitive diagrams, loss of intellectual property, or data exfiltration through the execution of malicious scripts. The vulnerability affects the confidentiality, integrity, and availability of the application's data, as attackers can modify or delete stored diagrams, inject malicious content, or redirect users to phishing sites. This type of vulnerability is particularly dangerous in enterprise environments where drawio is used for creating critical system architecture diagrams, network topologies, or business process visualizations. The stored nature of the vulnerability means that the attack surface is not limited to a single user interaction but can affect multiple users over time, making it a persistent threat that requires immediate remediation. Security teams must consider the potential for lateral movement within their networks if attackers use this vulnerability to compromise user sessions and gain access to additional systems.
Mitigation strategies for CVE-2022-1730 require immediate application of the security patch released in version 18.0.4, which addresses the underlying input validation and output encoding issues. Organizations should implement comprehensive input sanitization measures that filter and escape all user-supplied data before storage, particularly focusing on HTML and JavaScript content. The implementation of Content Security Policy (CSP) headers can provide additional protection by restricting the sources from which scripts can be executed within the application context. Regular security audits of user input handling mechanisms should be conducted to identify similar vulnerabilities in other parts of the application. Network monitoring solutions should be configured to detect unusual patterns of data submission that may indicate attempted exploitation of XSS vulnerabilities. The vulnerability highlights the importance of maintaining up-to-date software versions and implementing robust security controls throughout the application lifecycle. Organizations should also consider implementing Web Application Firewalls (WAF) rules specifically designed to detect and block XSS attack patterns, particularly those targeting the specific input vectors where the vulnerability was discovered. Proper security training for developers on secure coding practices, including proper input validation and output encoding techniques, is essential to prevent similar vulnerabilities from being introduced in future releases. The incident underscores the critical need for continuous security assessment and the implementation of defense-in-depth strategies that protect against both known and emerging threats in web applications.