CVE-2009-0814 in Blogsa
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Widgets.aspx in Blogsa 1.0 Beta 3 and earlier allows remote attackers to inject arbitrary web script or HTML via the searchText parameter.
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Analysis
by VulDB Data Team • 07/04/2024
The vulnerability identified as CVE-2009-0814 represents a classic cross-site scripting flaw within the Blogsa content management system version 1.0 Beta 3 and earlier releases. This security weakness resides in the Widgets.aspx page which processes user input through the searchText parameter, creating an avenue for malicious actors to execute arbitrary web scripts or HTML code within the context of other users' browsers. The vulnerability stems from insufficient input validation and output encoding mechanisms that fail to properly sanitize user-supplied data before it is rendered back to end users.
This XSS vulnerability operates under the Common Weakness Enumeration classification as CWE-79, which specifically addresses Cross-Site Scripting flaws in web applications. The attack vector leverages the searchText parameter to inject malicious payloads that can execute in the victim's browser when the compromised page is accessed. The flaw exists due to inadequate sanitization of user input, allowing attackers to bypass security controls that should prevent the execution of untrusted code within the application's context. The vulnerability is particularly concerning as it affects the core functionality of the blogging platform's widget system, which typically serves dynamic content and user-generated elements.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable attackers to perform session hijacking, steal cookies, redirect users to malicious sites, or even execute more sophisticated attacks such as credential theft. When users interact with the compromised widgets page, any malicious script injected through the searchText parameter will execute in their browser context, potentially leading to unauthorized access to their accounts or the complete compromise of their session. The vulnerability affects all users of the affected Blogsa versions, making it a widespread concern for organizations relying on this platform for their blogging needs.
Mitigation strategies for CVE-2009-0814 should focus on implementing proper input validation and output encoding practices. The most effective approach involves sanitizing all user-supplied input through comprehensive validation routines that reject or escape potentially dangerous characters and patterns before they are processed or stored. Organizations should implement strict input filtering mechanisms that remove or encode special characters that could be used in XSS attacks, particularly those associated with script tags, event handlers, and JavaScript protocols. Additionally, deploying Content Security Policy headers and implementing proper output encoding for all dynamic content can significantly reduce the risk of exploitation. The vulnerability aligns with ATT&CK technique T1566.001 which covers Phishing with Malicious Attachments, as attackers could leverage this flaw to deliver malicious payloads through seemingly legitimate blog content, and T1059.007 which addresses Command and Scripting Interpreter: JavaScript, as the vulnerability specifically targets JavaScript execution contexts. Regular security updates and patches should be prioritized to address this and similar vulnerabilities in web applications, with particular attention to input validation mechanisms that prevent unauthorized code execution in user-facing interfaces.