CVE-2017-1303 in Web Content Manager
Summary
by MITRE
IBM WebSphere Portal and Web Content Manager 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: 125457.
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Analysis
by VulDB Data Team • 12/04/2025
The vulnerability identified as CVE-2017-1303 represents a critical cross-site scripting flaw affecting IBM WebSphere Portal and Web Content Manager versions 7.0, 8.0, 8.5, and 9.0. This security weakness resides in the web user interface components where user-supplied input is not properly sanitized before being rendered back to the browser. The flaw enables malicious actors to inject arbitrary JavaScript code into web pages that are subsequently executed by other users' browsers, creating a persistent threat vector within the application environment.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding mechanisms within the web content management system. When users submit content or interact with portal features, the application fails to adequately filter or escape special characters that could be interpreted as executable JavaScript code. This allows attackers to craft malicious payloads that exploit the trust relationship between the web application and its users, particularly when the vulnerable components handle user-generated content or dynamic parameters. The vulnerability specifically targets the web user interface rendering process where untrusted data flows directly into HTML output without proper sanitization.
The operational impact of this cross-site scripting vulnerability extends beyond simple script execution, creating significant risks for organizations relying on IBM WebSphere Portal for business-critical applications. Attackers can leverage this flaw to steal session cookies, perform unauthorized actions on behalf of legitimate users, and potentially access sensitive data within trusted sessions. The vulnerability's potential for credential disclosure makes it particularly dangerous in enterprise environments where portal systems often serve as central access points to corporate resources and sensitive information repositories. The attack surface is further expanded when considering that authenticated users may be able to inject scripts that persist across multiple sessions, creating long-term threats to system integrity and user security.
Organizations affected by this vulnerability should implement immediate mitigations including input validation controls, output encoding mechanisms, and comprehensive security monitoring. The fix involves ensuring that all user-supplied input is properly sanitized before being processed or displayed within the web interface, with particular attention to parameters used in dynamic content generation. Security teams should also consider implementing content security policies to prevent unauthorized script execution and establish regular security assessments to identify similar vulnerabilities in other application components. This remediation effort aligns with industry best practices for preventing cross-site scripting attacks and addresses the underlying security weaknesses that make such exploits possible.
The vulnerability demonstrates characteristics consistent with CWE-79, which specifically addresses cross-site scripting flaws in web applications. From an attack framework perspective, this issue maps to ATT&CK technique T1059.007 for script injection and T1531 for credential access through session hijacking. The remediation approach should include comprehensive security training for developers on secure coding practices, implementation of automated input validation tools, and regular security testing of web applications. Organizations should also consider deploying web application firewalls and monitoring solutions to detect and prevent exploitation attempts targeting this class of vulnerability.