CVE-2005-4588 in Koobi
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Koobi 5 allows remote attackers to inject arbitrary web script or HTML via nested, malformed url BBCode tags. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
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Analysis
by VulDB Data Team • 06/15/2025
The vulnerability described in CVE-2005-4588 represents a classic cross-site scripting flaw within the Koobi 5 content management system that exposes users to potential malicious code execution. This type of vulnerability falls under the broader category of web application security weaknesses that have been consistently identified as critical threats to user data and system integrity. The specific nature of this flaw involves the improper handling of BBCode tags, which are commonly used in forums and content management systems to format text content. When the system processes nested or malformed URL BBCode tags, it fails to properly sanitize or escape the input before rendering it in the user interface, creating an opening for attackers to inject malicious scripts.
The technical implementation of this vulnerability demonstrates a failure in input validation and output encoding mechanisms within the Koobi 5 platform. BBCode tags, particularly URL tags, are designed to create hyperlinks within user-generated content, but when these tags contain nested structures or malformed syntax, the application's parsing logic does not adequately protect against script injection attempts. This weakness allows attackers to craft malicious BBCode sequences that, when processed by the system, execute unintended JavaScript code within the context of other users' browsers. The vulnerability specifically targets the rendering pipeline where user input transitions from storage to display, creating a direct pathway for persistent or reflected XSS attacks that can compromise user sessions and access credentials.
The operational impact of this vulnerability extends beyond simple script execution to encompass potential data theft, session hijacking, and the ability to perform actions on behalf of authenticated users. When users encounter maliciously crafted BBCode content on a vulnerable Koobi 5 installation, their browsers execute the embedded scripts which can capture cookies, redirect them to malicious sites, or perform unauthorized actions against the application. This threat vector particularly affects forum environments where users frequently interact with content created by others, making the attack surface significantly larger than in isolated applications. The vulnerability's persistence depends on whether the malicious content is stored within the application's database or simply reflected in response pages, with stored XSS variants presenting the most severe risk to user safety and system integrity.
Security professionals should approach this vulnerability through the lens of established frameworks such as CWE-79, which specifically addresses cross-site scripting weaknesses in software applications. The ATT&CK framework categorizes this type of vulnerability under the technique of "Command and Scripting Interpreter" where adversaries leverage web application flaws to execute malicious commands. Organizations should implement comprehensive input validation that includes strict sanitization of all BBCode and HTML content, employ proper output encoding mechanisms, and utilize Content Security Policy headers to limit script execution capabilities. Additionally, regular security assessments and code reviews focusing on user input handling should be conducted to identify similar weaknesses in other components of the application stack. The remediation process must include immediate patching of the affected software version and implementation of robust input filtering that prevents the injection of potentially harmful markup sequences while maintaining the legitimate functionality of the BBCode parsing system.