CVE-2008-4634 in Movable Type
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Movable Type 4 through 4.21 allows remote attackers to inject arbitrary web script or HTML via unknown vectors related to the administrative page, a different vulnerability than CVE-2008-4079.
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Analysis
by VulDB Data Team • 11/30/2017
The vulnerability identified as CVE-2008-4634 represents a critical cross-site scripting flaw affecting Movable Type versions 4 through 4.21, specifically targeting the administrative interface. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is classified as a fundamental web application security weakness that allows attackers to inject malicious client-side scripts into web pages viewed by other users. The flaw is particularly concerning because it occurs within the administrative page functionality, which typically handles sensitive user data and system configuration parameters, making it a prime target for exploitation.
The technical nature of this vulnerability involves the improper sanitization of user input within the administrative interface of Movable Type, creating an environment where malicious actors can inject arbitrary web scripts or HTML code. Unlike CVE-2008-4079 which may have affected different components, this vulnerability specifically targets the administrative page handling mechanisms, suggesting that the input validation occurs at a level where administrative parameters are processed. The attack vector likely involves sending specially crafted payloads through administrative forms, configuration fields, or parameter handling within the admin interface, which are then executed in the context of other users' browsers when they access the affected administrative pages.
The operational impact of this vulnerability is significant as it provides remote attackers with the ability to execute arbitrary code in the browsers of authenticated users who access the administrative interface. This could lead to complete compromise of administrative accounts, enabling attackers to modify website content, steal session cookies, redirect users to malicious sites, or perform unauthorized administrative actions. The vulnerability's presence in the administrative page means that successful exploitation could result in full system compromise, as administrators typically have elevated privileges and access to sensitive data and system controls.
From a cybersecurity perspective, this vulnerability aligns with ATT&CK technique T1566.001 for Initial Access through Spearphishing Attachment, where attackers might use this XSS flaw to establish a foothold through malicious administrative interactions. The remediation approach should prioritize immediate patching of the Movable Type application to the latest available version that addresses this specific XSS vulnerability. Organizations should also implement input validation and output encoding measures to prevent similar issues, including implementing Content Security Policy headers, using proper HTML escaping for all dynamic content, and conducting regular security assessments of web applications. Additionally, network segmentation and monitoring of administrative interface access can help detect and prevent exploitation attempts, while user education regarding suspicious administrative interactions remains crucial for overall security posture.