CVE-2006-0733 in WordPress
Summary
by MITRE
** DISPUTED ** Cross-site scripting (XSS) vulnerability in WordPress 2.0.0 allows remote attackers to inject arbitrary web script or HTML via scriptable attributes such as (1) onfocus and (2) onblur in the "author s website" field. NOTE: followup comments to the researcher s web log suggest that this issue is only exploitable by the same user who injects the XSS, so this might not be a vulnerability.
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Analysis
by VulDB Data Team • 04/23/2025
The vulnerability described in CVE-2006-0733 represents a disputed cross-site scripting issue within WordPress version 2.0.0 that specifically targets the author website field functionality. This vulnerability operates under the premise that malicious actors could potentially inject arbitrary web scripts or HTML content through scriptable attributes such as onfocus and onblur within the website field of WordPress author profiles. The technical nature of this flaw suggests it could be exploited to manipulate web page behavior when users interact with the affected fields, potentially leading to unauthorized code execution within the context of the victim's browser session.
The operational impact of this vulnerability, while disputed, would be significant if fully exploitable, as it could allow attackers to execute malicious scripts in the browsers of users who view affected WordPress pages. The specific attributes onfocus and onblur are particularly concerning because they are event handlers that execute JavaScript code when elements receive or lose focus, making them prime targets for XSS exploitation. The vulnerability's classification as disputed stems from researcher comments indicating that exploitation might be limited to the same user who injects the XSS, which would severely restrict its practical impact and aligns with certain attack patterns described in the attack tree framework.
This issue demonstrates the importance of input validation and output sanitization in content management systems, particularly when dealing with user-generated content that gets rendered in web pages. The vulnerability relates to CWE-79 which specifically addresses cross-site scripting flaws in web applications, and could potentially map to techniques found in the attack pattern taxonomy under the ATT&CK framework for web application attacks. The restricted exploitation scope mentioned in follow-up comments suggests that this may not represent a true vulnerability in the traditional sense, but rather a limitation in the attack surface that requires careful consideration when assessing the overall security posture of the affected WordPress installation.
The broader implications for WordPress security in 2006 highlight the growing maturity of web application attack vectors and the need for comprehensive security testing of user input handling mechanisms. While the disputed nature of this vulnerability suggests it may not be exploitable in typical scenarios, it serves as a reminder of the complex interplay between user permissions, input validation, and attack surface reduction. The vulnerability underscores the importance of maintaining up-to-date security practices and understanding the nuances of different attack vectors, particularly when assessing whether certain inputs can be manipulated in ways that bypass existing security controls. This case also demonstrates how security researchers often need to reassess vulnerability claims through community feedback and additional testing to determine true exploitability and impact levels.