CVE-2007-6102 in Feed2JS
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Feed to JavaScript (Feed2JS) 1.91 allows remote attackers to inject arbitrary web script or HTML via a URL in a feed.
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Analysis
by VulDB Data Team • 09/11/2018
The CVE-2007-6102 vulnerability represents a critical cross-site scripting flaw in the Feed to JavaScript (Feed2JS) version 1.91 web application. This vulnerability exists within the feed processing functionality that allows users to embed RSS and Atom feeds into web pages through JavaScript. The flaw specifically manifests when the application fails to properly sanitize user-supplied URL parameters that are part of feed data, creating an avenue for malicious actors to inject arbitrary web scripts or HTML content. The vulnerability is classified under CWE-79 as a failure to sanitize user input before using it in web output, making it a classic XSS vulnerability that can be exploited across multiple web applications utilizing this feed processing library.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious feed containing specially formatted URLs that include JavaScript code or HTML tags. When the Feed2JS application processes this malformed feed data, it incorporates the malicious content directly into the generated JavaScript output without proper sanitization or encoding. This allows attackers to execute arbitrary scripts in the context of victims' browsers who view pages generated by the vulnerable application. The vulnerability is particularly dangerous because it can be leveraged to steal session cookies, perform unauthorized actions on behalf of users, redirect victims to malicious sites, or even deface web pages that utilize the affected feed processing functionality.
The operational impact of CVE-2007-6102 extends beyond simple script injection, as it can enable sophisticated attack chains that align with multiple ATT&CK techniques including T1566 for social engineering and T1059 for command and script injection. Organizations using Feed2JS 1.91 are particularly vulnerable because this library was widely adopted for embedding feeds into websites, making the attack surface extensive across numerous web applications. The vulnerability can be exploited through various vectors including compromised feed sources, malicious feed providers, or even through direct manipulation of feed data that is consumed by the application. Attackers can leverage this flaw to perform persistent attacks against users of vulnerable websites, potentially leading to complete compromise of user sessions and unauthorized access to sensitive information.
Mitigation strategies for this vulnerability require immediate action to either patch the Feed2JS library to version 1.92 or later, which includes proper input sanitization and output encoding mechanisms. Organizations should implement comprehensive input validation that strips or encodes potentially dangerous characters from feed URLs before processing, while also ensuring that all user-supplied data is properly escaped when rendered in web contexts. The implementation of Content Security Policy headers can provide additional defense-in-depth measures to prevent execution of unauthorized scripts even if the primary vulnerability is not fully patched. Additionally, regular security audits of web applications utilizing third-party libraries should include checks for known vulnerabilities in feed processing components, with automated scanning tools capable of identifying the specific vulnerable version of Feed2JS. The remediation process should also include monitoring of feed sources for malicious content and implementing proper feed validation mechanisms to prevent exploitation of similar vulnerabilities in other feed processing systems.