CVE-2005-1448 in Serendipity
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the BBCode plugin for Serendipity before 0.8 allows remote attackers to inject arbitrary web script or HTML via unknown vectors.
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Analysis
by VulDB Data Team • 06/01/2019
The vulnerability identified as CVE-2005-1448 represents a critical cross-site scripting flaw within the BBCode plugin of the Serendipity blogging platform version 0.8 and earlier. This security weakness resides in the plugin's handling of user input, specifically within the BBCode processing functionality that converts BBCode markup into HTML for display on web pages. The vulnerability allows remote attackers to inject malicious scripts or HTML content through unspecified vectors, potentially compromising the security of both the blogging platform and its users. The issue stems from inadequate input validation and output encoding mechanisms within the plugin's codebase, creating an environment where malicious payloads can be executed in the context of other users' browsers.
The technical exploitation of this vulnerability occurs when the BBCode plugin fails to properly sanitize or encode user-provided content before rendering it as HTML within the web application. This failure creates a pathway for attackers to inject malicious JavaScript code or HTML elements that execute in the browsers of other users who view the affected content. The unspecified vectors suggest that the vulnerability could be triggered through various input methods within the BBCode processing system, potentially including different BBCode tags or parameters that are not properly validated. This type of vulnerability falls under CWE-79 which specifically addresses cross-site scripting flaws in web applications, where improper validation of user-supplied data leads to the execution of malicious scripts in the victim's browser context.
The operational impact of CVE-2005-1448 extends beyond simple script injection, as it can enable attackers to perform a range of malicious activities including session hijacking, credential theft, defacement of the blog content, and redirection to malicious websites. When exploited, the vulnerability allows threat actors to execute arbitrary code in the context of authenticated users, potentially compromising the entire blogging platform if users have administrative privileges. The vulnerability affects not just the immediate users of the blog but also creates risks for visitors who may unknowingly execute malicious code when viewing content that contains the injected scripts. This represents a significant risk to the integrity and security of the web application, as it undermines the trust model between the platform and its users.
Mitigation strategies for this vulnerability require immediate patching of the affected Serendipity version to implement proper input validation and output encoding mechanisms. The solution involves ensuring that all user-provided BBCode content is properly sanitized before processing and rendering, with special attention to encoding HTML characters and validating BBCode syntax against a whitelist of allowed elements. Security practitioners should implement Content Security Policy (CSP) headers to limit script execution and prevent unauthorized code injection. Additionally, regular security audits of third-party plugins and the implementation of automated input validation routines can help prevent similar vulnerabilities from emerging in the future. The remediation process should also include comprehensive testing of the plugin functionality to ensure that legitimate BBCode features remain operational while malicious inputs are properly blocked. Organizations should consider implementing web application firewalls and monitoring systems to detect and prevent exploitation attempts of similar vulnerabilities.