CVE-2006-5063 in Elog Web Logbook
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Elog 2.6.1 allows remote attackers to inject arbitrary web script or HTML by editing log entries in HTML mode.
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Analysis
by VulDB Data Team • 04/23/2026
The vulnerability identified as CVE-2006-5063 represents a critical cross-site scripting flaw within the Elog 2.6.1 weblogging application that exposes users to significant security risks. This vulnerability specifically affects the application's handling of user input when editing log entries in HTML mode, creating an avenue for malicious actors to execute arbitrary web scripts or HTML code within the context of other users' browsers.
The technical flaw stems from insufficient input validation and output sanitization mechanisms within the Elog application's log entry editing functionality. When users attempt to modify log entries using HTML mode, the application fails to properly sanitize or escape user-supplied content before rendering it back to the browser. This inadequate filtering allows attackers to inject malicious scripts that can execute in the victim's browser context, leveraging the trust relationship between the user and the vulnerable application.
From an operational impact perspective, this vulnerability enables remote attackers to perform various malicious activities including but not limited to session hijacking, credential theft, defacement of the blog content, and redirection to malicious websites. The attack requires minimal privileges as it operates entirely through web-based interactions without requiring any special access to the server or application infrastructure. Successful exploitation can lead to complete compromise of user sessions and potential data exfiltration from the affected system.
The vulnerability aligns with CWE-79 which categorizes cross-site scripting as a weakness where applications fail to properly validate or escape user-provided data before incorporating it into web pages. This weakness falls under the broader category of injection flaws and represents a fundamental security gap in the application's data handling processes. The attack pattern follows typical XSS exploitation techniques as outlined in the MITRE ATT&CK framework under the technique T1566 for credential access and T1059 for command and scripting interpreter, demonstrating how such vulnerabilities can serve as entry points for more sophisticated attacks.
Effective mitigation strategies should focus on implementing robust input validation and output encoding mechanisms throughout the application's data flow. The most critical remediation involves sanitizing all user-supplied content before rendering it in HTML contexts, utilizing proper HTML escaping techniques, and implementing content security policies to prevent unauthorized script execution. Additionally, developers should consider implementing proper access controls and input filtering that validates data against expected formats while maintaining application functionality. Regular security assessments and code reviews focused on data handling practices can help prevent similar vulnerabilities from emerging in future versions of the application.