CVE-2006-7223 in XWiki
Summary
by MITRE
PreviewAction in XWiki 0.9.543 through 0.9.1252 does not set the Author field to the identity of the user who last modified a document, which allows remote authenticated users without programming rights to execute arbitrary code by selecting a document whose author has programming rights, modifying this document to contain a script, and previewing without saving the document.
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Analysis
by VulDB Data Team • 06/22/2026
The vulnerability described in CVE-2006-7223 represents a critical security flaw in XWiki version 0.9.543 through 0.9.1252 that stems from improper handling of document authorship information within the PreviewAction component. This issue specifically affects the PreviewAction functionality which is designed to allow users to preview document changes before saving them to the repository. The flaw occurs because the system fails to properly validate or sanitize the author field during preview operations, creating a path for privilege escalation attacks.
The technical implementation of this vulnerability leverages the fact that PreviewAction does not correctly set the Author field to reflect the identity of the user who last modified a document. When an authenticated user without programming rights attempts to preview a document, the system incorrectly inherits or displays the author field from the original document, which may contain programming rights. This misconfiguration allows malicious users to exploit the preview functionality by selecting documents authored by users with programming privileges, modifying these documents to include malicious scripts, and then previewing the content without saving changes. The preview operation itself becomes a vector for code execution since the system processes the modified content through the preview mechanism.
The operational impact of this vulnerability is significant as it enables remote authenticated users to bypass normal access controls and execute arbitrary code on the server. This represents a privilege escalation attack where users with limited permissions can leverage documents authored by administrators or users with programming rights to gain elevated privileges. The vulnerability specifically targets the document preview feature, which is commonly used during document editing workflows, making it particularly dangerous as users frequently interact with this functionality. The attack requires the malicious user to have access to a document authored by someone with programming rights, but does not require direct access to those programming privileges.
From a cybersecurity perspective, this vulnerability aligns with CWE-200, which covers improper output neutralization for logs, and CWE-79, which addresses cross-site scripting vulnerabilities. The flaw also maps to ATT&CK technique T1059, which covers command and scripting interpreter, as it allows for arbitrary code execution. The vulnerability demonstrates poor input validation and insufficient access control mechanisms within the XWiki application's preview functionality. Organizations using affected XWiki versions face potential data breaches, system compromise, and unauthorized access to sensitive information. The risk is compounded by the fact that the preview functionality is typically accessible to many users during normal document editing processes, making the attack surface larger than initially apparent.
The recommended mitigations for this vulnerability include immediate upgrading to a patched version of XWiki that properly implements author field validation during preview operations. Administrators should also implement additional access controls and monitoring around document preview functionality, particularly for documents that may contain privileged author information. Security configurations should be reviewed to ensure that preview operations do not inadvertently execute potentially malicious content. The vulnerability highlights the importance of proper access control implementation and input sanitization in web applications, particularly those that provide document editing and preview capabilities. Organizations should also consider implementing network segmentation and monitoring solutions to detect suspicious preview activities that may indicate exploitation attempts.