CVE-2008-1873 in Nukeet
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the private message feature in Nuke ET 3.2 and 3.4, when using Internet Explorer, allows remote authenticated users to inject arbitrary web script or HTML via a CSS property in the STYLE attribute of a DIV element in the mensaje parameter. NOTE: some of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 08/14/2025
The vulnerability identified as CVE-2008-1873 represents a critical cross-site scripting flaw within the private messaging functionality of Nuke ET versions 3.2 and 3.4. This security weakness specifically targets the interaction between the application's message handling system and Internet Explorer browsers, creating a pathway for malicious actors to execute arbitrary code within the context of a victim's session. The vulnerability exploits the application's insufficient input validation mechanisms when processing CSS properties within the STYLE attribute of DIV elements, particularly when these elements are embedded within the mensaje parameter of private messages.
The technical exploitation of this vulnerability relies on the specific parsing behavior of Internet Explorer's rendering engine, which processes CSS properties in ways that differ from other browsers. Attackers can craft malicious private messages containing specially formatted CSS code within the STYLE attribute of DIV elements, where the mensaje parameter serves as the injection vector. When an authenticated user views the malicious message, the browser's CSS parser executes the injected code, potentially leading to session hijacking, credential theft, or redirection to malicious sites. This particular variant of XSS demonstrates how browser-specific rendering behaviors can create unique attack surfaces that may not be apparent in other environments.
The operational impact of this vulnerability extends beyond simple script execution, as it enables attackers to leverage the authenticated user's privileges within the Nuke ET application. Since the vulnerability requires authentication to exploit, attackers must first compromise user credentials through other means such as phishing or credential stuffing attacks. Once authenticated, they can deliver malicious payloads that persist within the application's messaging system, potentially affecting multiple users who view the compromised messages. The attack chain typically involves social engineering to gain initial access followed by the delivery of malicious private messages designed to exploit the IE-specific CSS parsing behavior.
Security professionals should note that this vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications, and represents a classic case of insufficient input sanitization in web applications. The ATT&CK framework categorizes this as a web application attack vector under the technique of "Cross-Site Scripting" with potential for privilege escalation through session manipulation. Organizations should implement comprehensive input validation mechanisms that strip or encode CSS attributes before processing user-generated content, particularly when dealing with rich text or HTML input fields. The vulnerability also highlights the importance of considering browser-specific behaviors in security testing, as the exploitation relies on IE's particular handling of CSS properties within the STYLE attribute.
Mitigation strategies should include immediate patching of affected Nuke ET versions, implementation of Content Security Policy headers to restrict script execution, and comprehensive input sanitization that removes or encodes CSS attributes from user-submitted content. Organizations should also consider deploying web application firewalls to detect and block suspicious CSS injection patterns, while implementing regular security testing that includes browser-specific vulnerability assessments. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date software versions and conducting thorough security reviews of all user input handling mechanisms within web applications.