CVE-2006-2880 in PyBlosxom
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the Contributed Packages for PyBlosxom 1.2.2 and earlier allows remote attackers to inject arbitrary web script or HTML via the Comments plugin in the (1) url and (2) author fields.
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Analysis
by VulDB Data Team • 07/28/2018
The vulnerability identified as CVE-2006-2880 represents a critical cross-site scripting flaw within the PyBlosxom blogging platform version 1.2.2 and earlier releases. This weakness resides specifically within the Comments plugin functionality, which processes user input for both url and author fields. The vulnerability stems from inadequate input validation and output sanitization mechanisms that fail to properly escape or filter malicious script content entered by attackers. The flaw operates under CWE-79 which classifies it as a weakness allowing injection of malicious scripts into web applications, making it a prime target for exploitation by threat actors seeking to compromise user sessions or deface web content.
The technical exploitation of this vulnerability occurs when remote attackers submit malicious payloads through the Comments plugin interface, specifically targeting the url and author input fields. When these fields are rendered on web pages without proper sanitization, the injected scripts execute within the context of other users' browsers, potentially leading to session hijacking, credential theft, or arbitrary code execution. The vulnerability demonstrates characteristics consistent with the ATT&CK framework's T1566.001 technique, which involves the exploitation of web application vulnerabilities to execute malicious code in user browsers. The attack vector is particularly dangerous because it leverages legitimate user interaction patterns within the comments system, making detection more challenging.
The operational impact of this vulnerability extends beyond simple script injection, potentially enabling attackers to perform session manipulation, steal sensitive user data, or redirect users to malicious websites. The flaw affects the core functionality of the PyBlosxom platform's commenting system, which is essential for user engagement and community interaction. Organizations relying on affected versions face significant risks including data breaches, reputational damage, and potential regulatory compliance violations. The vulnerability's exploitation can lead to persistent malicious presence within the application, as injected scripts remain active until manually removed from the database entries. This creates a lasting security risk that can affect multiple users over extended periods.
Mitigation strategies for CVE-2006-2880 require immediate patching of the affected PyBlosxom installations to version 1.2.3 or later, which includes proper input sanitization and output encoding mechanisms. Administrators should implement comprehensive input validation that filters or escapes special characters in all user-submitted content, particularly in url and author fields. The implementation of Content Security Policy headers can provide additional defense-in-depth measures to prevent script execution. Regular security audits and code reviews should be conducted to identify similar vulnerabilities in other application components, while input sanitization libraries should be integrated into the application's processing pipeline. Organizations should also consider implementing web application firewalls to detect and block malicious input patterns targeting known XSS vulnerabilities, ensuring that the application's security posture remains robust against evolving threat landscapes.