CVE-2018-1673 in WebSphere Portal
Summary
by MITRE
IBM WebSphere Portal 7.0, 8.0, 8.5, and 9.0 is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session. IBM X-Force ID: 145108.
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Analysis
by VulDB Data Team • 05/25/2023
IBM WebSphere Portal versions 7.0, 8.0, 8.5, and 9.0 contain a cross-site scripting vulnerability that represents a critical security risk to organizations relying on this enterprise portal platform. This vulnerability falls under CWE-79 which specifically addresses cross-site scripting flaws in web applications. The flaw enables malicious actors to inject arbitrary JavaScript code into the web user interface, fundamentally compromising the integrity of the portal's security model. The vulnerability exists due to insufficient input validation and output encoding mechanisms within the portal's web rendering components, allowing attacker-controlled data to be executed as client-side scripts in the context of legitimate user sessions.
The operational impact of this vulnerability extends beyond simple script execution, as it can lead to complete session hijacking and credential theft within trusted browser sessions. When exploited, the XSS vulnerability allows attackers to steal session cookies, authentication tokens, and potentially sensitive user data that flows through the portal interface. This represents a significant threat to enterprise security since WebSphere Portal typically serves as a central hub for business-critical applications and user authentication. The vulnerability's exploitation can result in unauthorized access to confidential information, privilege escalation, and potential lateral movement within the enterprise network. Attackers can leverage this weakness to impersonate legitimate users and perform actions with their privileges, making it particularly dangerous in environments where the portal handles sensitive business data or serves as an authentication gateway.
Organizations utilizing affected WebSphere Portal versions must implement immediate mitigation strategies to protect their systems from exploitation. The recommended approach includes deploying proper input validation mechanisms, implementing comprehensive output encoding for all user-supplied data, and configuring appropriate content security policies to prevent script execution. Security patches released by IBM address the underlying vulnerability by strengthening the portal's sanitization routines and improving the handling of user input in web rendering components. Additionally, implementing web application firewalls and security monitoring solutions can help detect and prevent exploitation attempts. The vulnerability aligns with ATT&CK technique T1059.007 for script injection and T1531 for credential access through session manipulation, demonstrating how this flaw can serve as a foundational entry point for more sophisticated attacks. Organizations should also conduct thorough security assessments of their portal configurations and review access controls to minimize potential damage from successful exploitation attempts.