CVE-2003-1587 in LoganPro
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in LoganPro allows remote attackers to inject arbitrary web script or HTML via a crafted User-Agent HTTP header.
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Analysis
by VulDB Data Team • 04/30/2026
The vulnerability identified as CVE-2003-1587 represents a classic cross-site scripting flaw within the LoganPro web application framework. This security weakness resides in the application's handling of HTTP headers, specifically the User-Agent field which is commonly used by web servers to identify client browser characteristics. The flaw allows malicious actors to inject arbitrary web script or HTML code through manipulation of this header field, creating a persistent security risk for users interacting with the affected system.
This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security flaws. The technical implementation issue stems from inadequate input validation and output encoding within LoganPro's HTTP header processing routines. When the application receives a crafted User-Agent header containing malicious script code, it fails to properly sanitize or escape the input before rendering it in the web interface, thereby enabling the execution of arbitrary code within the context of other users' browsers.
The operational impact of this vulnerability extends beyond simple script injection, as it can be leveraged to perform various malicious activities including session hijacking, credential theft, and data exfiltration. Attackers can craft User-Agent headers that contain malicious javascript payloads designed to steal cookies, redirect users to phishing sites, or even execute commands on behalf of authenticated users. The remote nature of this attack vector means that exploitation can occur without requiring any local access to the target system, making it particularly dangerous for web applications that process user input through HTTP headers.
The attack surface for this vulnerability is significant since User-Agent headers are routinely processed by web applications for various purposes including browser detection, analytics, and access control. According to ATT&CK framework, this vulnerability maps to T1059.007 for Scripting and T1566.001 for Spearphishing Attachment, as attackers can use this flaw to deliver malicious payloads through seemingly legitimate HTTP requests. The lack of proper input sanitization in the User-Agent header processing creates a persistent threat that can affect multiple users who interact with the vulnerable application, particularly in environments where the application serves a large number of concurrent users.
Mitigation strategies should focus on implementing robust input validation and output encoding mechanisms throughout the LoganPro application. The primary defense involves sanitizing all HTTP header inputs, particularly the User-Agent field, by removing or escaping potentially dangerous characters and script tags. Organizations should also implement Content Security Policy headers to limit the execution of inline scripts and restrict the sources from which scripts can be loaded. Additionally, regular security testing including dynamic application security testing and manual penetration testing should be conducted to identify similar vulnerabilities in other input fields and processing routines. The vulnerability highlights the importance of following secure coding practices as outlined in OWASP Top Ten and ISO/IEC 27001 standards, emphasizing that all user-supplied data must be treated as untrusted and properly validated before processing.