CVE-2002-1683 in Badblue
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in BadBlue Personal Edition 1.7.3 allows remote attackers to execute arbitrary script as other users by injecting script into the cleanSearchString() function.
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Analysis
by VulDB Data Team • 07/16/2025
The CVE-2002-1683 vulnerability represents a classic cross-site scripting flaw in the BadBlue Personal Edition 1.7.3 web server software, demonstrating how insecure input handling can create persistent security risks for web applications. This vulnerability specifically targets the cleanSearchString() function, which serves as a critical component in processing user input for search operations within the web interface. The flaw arises from inadequate sanitization of user-supplied data, allowing malicious actors to inject malicious scripts that execute in the context of other users' browsers. The vulnerability exists because the application fails to properly validate and escape input parameters before incorporating them into dynamic web content, creating an attack surface where user interactions can be manipulated to deliver malicious payloads. This represents a fundamental breakdown in the application's security architecture and highlights the importance of proper input validation and output encoding in web applications.
The technical exploitation of this vulnerability occurs through the injection of malicious JavaScript code into the search string parameter that gets processed by the cleanSearchString() function. When a victim accesses a page containing the maliciously crafted search string, the script executes within their browser session, potentially allowing attackers to steal session cookies, perform unauthorized actions on behalf of users, or redirect victims to malicious websites. The vulnerability operates at the application layer and specifically targets the web server's search functionality, making it particularly dangerous as it can be triggered through normal user interactions with the search interface. The attack vector is particularly concerning because it does not require any special privileges or authentication to exploit, as the malicious script can be injected through any user input field that gets processed by the vulnerable function. This makes the vulnerability particularly attractive to attackers who can leverage it to compromise multiple users through a single injection point.
The operational impact of CVE-2002-1683 extends beyond simple script execution, as it can enable more sophisticated attacks such as session hijacking, data exfiltration, and credential theft. Attackers can craft payloads that steal authentication tokens or session identifiers, allowing them to impersonate legitimate users and gain unauthorized access to protected resources. The vulnerability also creates opportunities for phishing attacks where malicious scripts can redirect users to fraudulent websites or manipulate the user interface to deceive victims into revealing sensitive information. Organizations running BadBlue Personal Edition 1.7.3 are particularly vulnerable as this represents a server-side vulnerability that can affect multiple users simultaneously, making it a significant threat to web application security. The long-term implications include potential data breaches, compliance violations, and reputational damage when attackers successfully exploit this vulnerability to compromise user sessions and access sensitive information.
Mitigation strategies for CVE-2002-1683 should focus on implementing proper input validation and output encoding techniques to prevent script injection attacks. Organizations should ensure that all user input is properly sanitized before processing, particularly input that gets rendered in web pages or used in dynamic content generation. The implementation of Content Security Policy headers and proper HTML encoding of output data can significantly reduce the risk of XSS exploitation. Additionally, regular security updates and patches should be applied to address known vulnerabilities in web server software, as BadBlue Personal Edition 1.7.3 was vulnerable to this specific flaw. System administrators should also implement network monitoring and intrusion detection systems to identify potential exploitation attempts. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and represents a classic example of how insecure data handling can create persistent security risks in web applications. This vulnerability also maps to ATT&CK technique T1566.001 which covers phishing with malicious attachments or links, as attackers can exploit such vulnerabilities to deliver malicious payloads through seemingly legitimate web interfaces. Regular security assessments and code reviews should be conducted to identify similar input validation issues in other applications and prevent similar vulnerabilities from being introduced into web applications.