CVE-2018-11522 in Yosoro
Summary
by MITRE
Yosoro 1.0.4 has stored XSS.
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Analysis
by VulDB Data Team • 12/27/2024
The vulnerability identified as CVE-2018-11522 represents a stored cross-site scripting flaw within Yosoro version 1.0.4, a web application framework that appears to be designed for content management or similar purposes. This type of vulnerability allows attackers to inject malicious scripts into web applications that are then stored on the server and executed whenever users access the affected pages. The stored nature of this XSS vulnerability means that the malicious code persists in the application's database or storage system, making it particularly dangerous as it can affect multiple users over extended periods without requiring repeated exploitation attempts.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding within the Yosoro application's data handling mechanisms. When users submit content through the application interface, the system fails to properly sanitize or escape user-supplied data before storing it in the backend database. This allows malicious actors to inject HTML or JavaScript code into fields that should only accept legitimate content. The vulnerability is classified under CWE-79 as Cross-Site Scripting, which specifically addresses the improper handling of untrusted data in web applications. The flaw manifests when the application retrieves and displays this stored data without appropriate sanitization measures, enabling the injected scripts to execute in the context of other users' browsers.
The operational impact of this vulnerability extends beyond simple data theft or defacement, as it provides attackers with the capability to establish persistent access to user sessions and potentially escalate privileges within the application. An attacker could exploit this vulnerability to steal session cookies, redirect users to malicious websites, or inject malicious content that could compromise user credentials or personal information. The stored nature of the vulnerability means that once exploited, the malicious scripts will execute automatically for any user who accesses the affected content, potentially affecting numerous users simultaneously. This vulnerability aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter: JavaScript, as it allows for the execution of malicious JavaScript code within user browsers. The impact is particularly severe in environments where the application handles sensitive user data or where users may have elevated privileges within the system.
Mitigation strategies for CVE-2018-11522 should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application's data flow. Organizations should ensure that all user-supplied data is properly sanitized before storage and that appropriate HTML escaping is applied during data retrieval and display operations. The implementation of Content Security Policy headers can provide additional protection against script execution, while regular security audits and input validation testing should be conducted to identify similar vulnerabilities. The application should be updated to a patched version that addresses the stored XSS vulnerability, and developers should follow secure coding practices that adhere to OWASP Top Ten security guidelines. Additionally, implementing proper access controls and monitoring for suspicious content submissions can help detect and prevent exploitation attempts. The vulnerability underscores the critical importance of input validation and output encoding as fundamental security measures in web application development, particularly for frameworks that handle user-generated content.