CVE-2020-5612 in KonaWiki
Summary
by MITRE
Cross-site scripting vulnerability in KonaWiki 2.2.0 and earlier allows remote attackers to execute an arbitrary script via a specially crafted URL.
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Analysis
by VulDB Data Team • 07/30/2020
The vulnerability identified as CVE-2020-5612 represents a critical cross-site scripting flaw within KonaWiki version 2.2.0 and earlier installations. This security weakness resides in the web application's handling of user-supplied input within URL parameters, creating an avenue for malicious actors to inject and execute arbitrary scripts in the context of affected users' browsers. The vulnerability stems from insufficient input validation and output encoding mechanisms that fail to properly sanitize or escape special characters in web requests. Attackers can exploit this flaw by crafting malicious URLs containing script payloads that are subsequently executed when victims access the compromised wiki pages. The vulnerability operates under the Common Weakness Enumeration framework as CWE-79, which categorizes it as a cross-site scripting weakness where applications fail to properly validate or encode user-provided data before rendering it in web pages. This specific implementation allows remote attackers to execute scripts without requiring any authentication or privileged access, making the exploitation surface particularly broad and dangerous. The flaw directly violates the principle of least privilege and proper input sanitization that should be fundamental to all web applications handling user-generated content.
The operational impact of CVE-2020-5612 extends beyond simple script execution, as it can enable attackers to perform a wide range of malicious activities including session hijacking, data theft, and redirection to malicious websites. When users access the specially crafted URLs, the injected scripts can steal session cookies, capture keystrokes, modify page content, or redirect users to phishing sites. The vulnerability's remote exploitation capability means attackers can leverage it from anywhere on the internet without requiring physical access to the target network or system. This makes it particularly dangerous in environments where wiki applications serve as collaborative platforms with multiple users accessing sensitive information. The attack vector specifically targets the URL parameter handling mechanism, which is a common entry point for XSS attacks in web applications. According to the MITRE ATT&CK framework, this vulnerability maps to the T1059.001 technique for command and scripting interpreter, where attackers can execute scripts through web-based interfaces. The exploitation process typically involves crafting malicious URLs containing javascript payloads that are executed when the vulnerable application renders the page content, potentially leading to complete compromise of user sessions and data integrity violations.
Mitigation strategies for CVE-2020-5612 require immediate implementation of proper input validation and output encoding measures within the KonaWiki application. Organizations should upgrade to version 2.2.1 or later where this vulnerability has been addressed through enhanced input sanitization and proper HTML escaping mechanisms. The solution involves implementing strict validation of all URL parameters and user input before processing or rendering, ensuring that special characters such as angle brackets, quotes, and script tags are properly encoded or filtered. Security headers including Content Security Policy should be implemented to prevent unauthorized script execution and limit the attack surface. Additionally, organizations should conduct thorough security assessments of their wiki applications to identify similar vulnerabilities in other components or third-party libraries. The remediation process must include comprehensive testing of input validation mechanisms and regular security scanning to prevent regression of such vulnerabilities. System administrators should also implement network monitoring to detect suspicious URL patterns and unauthorized access attempts. The fix aligns with industry best practices outlined in OWASP Top 10 2017 and subsequent security standards that emphasize the importance of input validation and output encoding to prevent XSS attacks. Regular security updates and patch management processes should be established to ensure timely deployment of security fixes and reduce the window of exposure for known vulnerabilities.