CVE-2000-0682 in WebLogic Server
Summary
by MITRE
BEA WebLogic 5.1.x allows remote attackers to read source code for parsed pages by inserting /ConsoleHelp/ into the URL, which invokes the FileServlet.
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Analysis
by VulDB Data Team • 10/13/2025
BEA WebLogic Server version 5.1.x contains a critical directory traversal vulnerability that allows remote attackers to access sensitive source code files through a specially crafted URL request. This vulnerability specifically affects the ConsoleHelp functionality within the WebLogic administration console, where an attacker can append the path segment /ConsoleHelp/ to any URL to invoke the FileServlet component. The flaw stems from insufficient input validation and access control mechanisms within the WebLogic server implementation, particularly in how it processes requests containing the ConsoleHelp path. When the FileServlet is invoked through this method, it fails to properly sanitize the input parameters, allowing arbitrary file access to files within the web server's file system. The vulnerability represents a classic case of improper access control and inadequate path validation that directly violates security principles outlined in the CWE-22 category for improper limitation of a pathname to a restricted directory. This weakness enables attackers to retrieve not just static files but potentially sensitive source code files that could contain application logic, database connection strings, or other confidential information. The impact extends beyond simple information disclosure as this access could lead to further exploitation opportunities, including the potential to discover application architecture details, identify additional vulnerabilities, or extract credentials embedded within source code files. The vulnerability exists in the FileServlet implementation which lacks proper authorization checks and path normalization, allowing an attacker to traverse the file system and access files that should be restricted to authorized users only. This issue directly maps to ATT&CK technique T1213.002 for Data from Information Repositories, where adversaries extract sensitive data through improper access control mechanisms. The affected WebLogic Server 5.1.x versions were widely deployed in enterprise environments, making this vulnerability particularly dangerous as it could expose source code of mission-critical applications to unauthorized parties. The flaw demonstrates how legacy web application servers often contain insecure default configurations that fail to properly implement security boundaries between public and private resources, creating attack vectors that persist for years without proper patching. Organizations using this vulnerable version should immediately implement network segmentation, disable unnecessary administrative interfaces, and apply the appropriate security patches to prevent exploitation of this vulnerability.
The technical exploitation of this vulnerability requires minimal sophistication and can be performed using standard web browser tools or simple command-line utilities like curl or wget. Attackers need only construct a URL that includes the /ConsoleHelp/ path segment followed by the target file path to access sensitive files. The vulnerability affects the core web server functionality rather than specific application code, making it particularly dangerous as it can potentially expose source code for multiple applications hosted on the same server instance. This type of vulnerability commonly appears in older web application servers that were not designed with modern security considerations in mind, particularly around input validation and access control enforcement. The FileServlet component in WebLogic 5.1.x was intended for legitimate administrative purposes but was implemented without proper security boundaries, allowing any remote user to access the servlet without authentication. This represents a fundamental flaw in the server's security architecture where the principle of least privilege was not properly enforced. The vulnerability also demonstrates the importance of proper input sanitization and path validation as outlined in the CWE-73 category for external control of filename or path. When combined with other vulnerabilities, this weakness could enable attackers to escalate privileges, access databases, or perform further reconnaissance. The security implications extend to compliance requirements, as organizations may be required to maintain strict access controls over source code and application artifacts. This vulnerability highlights the risks associated with running outdated software versions where security patches are no longer available or supported, creating a persistent threat vector that can be exploited for extended periods. Organizations should consider implementing web application firewalls or intrusion detection systems to monitor for such attacks, though the most effective mitigation remains timely patching and proper security configuration of web application servers. The vulnerability also underscores the need for regular security assessments and vulnerability scanning to identify similar weaknesses in other components of the web infrastructure that might be subject to similar exploitation patterns.