CVE-2018-1483 in WebSphere Portal
Summary
by MITRE
IBM WebSphere Portal 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: 140918.
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Analysis
by VulDB Data Team • 02/27/2023
IBM WebSphere Portal versions 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 - Improper Neutralization of Input During Web Page Generation, which specifically addresses the failure to properly sanitize user input before incorporating it into web page content. The flaw exists in the portal's web user interface where malicious actors can inject arbitrary JavaScript code through input fields or parameters that are not adequately validated or escaped. This vulnerability enables attackers to manipulate the portal's behavior and potentially compromise user sessions within the trusted environment.
The operational impact of this vulnerability extends beyond simple script injection as it creates a pathway for attackers to execute malicious code within the context of a victim's browser session. When users interact with the compromised portal, the injected JavaScript executes with the privileges of the authenticated user, potentially allowing attackers to steal session cookies, credentials, or other sensitive information. The vulnerability specifically affects the portal's ability to properly handle user-supplied data in web UI elements, creating an attack surface where malicious input can be rendered as executable code rather than being treated as plain text. This represents a significant risk to enterprise security as the portal typically serves as a central access point for business applications and sensitive data.
From an attack perspective, this vulnerability aligns with ATT&CK technique T1531 - Account Access Removal and T1203 - Exploitation for Client Execution, as it enables attackers to establish persistent access through session hijacking and client-side exploitation. The vulnerability is particularly dangerous because it operates within a trusted session context, meaning that the injected code executes with the full privileges of the authenticated user. IBM's own security advisory indicates that this vulnerability can lead to credential disclosure within trusted sessions, which directly violates the principle of least privilege and can result in unauthorized access to sensitive enterprise resources. The attack vector typically involves crafting malicious input that gets reflected back to the user's browser, where it executes as JavaScript code.
Organizations should implement multiple layers of defense to mitigate this vulnerability. Input validation and output encoding should be implemented at every point where user data enters the system, with strict sanitization of all parameters before they are rendered in web UI elements. The portal should be configured to use Content Security Policy headers to prevent execution of unauthorized scripts, and regular security scanning should be performed to identify similar vulnerabilities. IBM released patches for this vulnerability in their security updates, and organizations should immediately apply the relevant fixes. Additionally, network segmentation and monitoring should be employed to detect anomalous behavior that might indicate exploitation attempts, while user education about phishing and social engineering attacks that might leverage this vulnerability should be maintained. The vulnerability demonstrates the critical importance of proper input validation and output encoding in web applications, particularly in enterprise portal environments where the attack surface is extensive and the potential impact of compromise is significant.