CVE-2019-17333 in EBX
Summary
by MITRE
The Web server component of TIBCO Software Inc.'s TIBCO EBX contains a vulnerability that theoretically allows authenticated users to perform stored cross-site scripting (XSS) attacks. Affected releases are TIBCO Software Inc.'s TIBCO EBX: versions 5.8.1.fixS and below, versions 5.9.3, 5.9.4, 5.9.5, 5.9.6, and 5.9.7.
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Analysis
by VulDB Data Team • 05/10/2025
The vulnerability identified as CVE-2019-17333 resides within the web server component of TIBCO EBX software, a business process management platform developed by TIBCO Software Inc. This security flaw represents a stored cross-site scripting vulnerability that specifically affects authenticated users within the system. The affected versions include TIBCO EBX 5.8.1.fixS and earlier releases, alongside versions 5.9.3 through 5.9.7, indicating a broad scope of impacted software installations. The vulnerability's classification as stored XSS means that malicious input can be permanently stored within the application's database and subsequently executed when other users access the affected content, creating a persistent threat vector that can compromise user sessions and potentially escalate to more severe attacks.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding within the web server's handling of user-supplied data. When authenticated users submit content through the application's interface, the system fails to properly sanitize or encode special characters that could be interpreted as executable script code. This flaw allows attackers to inject malicious JavaScript code into the application's data storage, which then gets served to other users when they view the affected content. The stored nature of this vulnerability means that the malicious payload remains persistent within the system until manually removed, providing attackers with extended time windows to exploit the vulnerability. This weakness aligns with CWE-79, which specifically addresses cross-site scripting vulnerabilities in web applications.
The operational impact of CVE-2019-17333 extends beyond simple data theft or session hijacking, as authenticated users with access to the vulnerable TIBCO EBX system can potentially leverage this vulnerability to perform more sophisticated attacks. An attacker who successfully exploits this vulnerability could execute malicious scripts in the context of other users' browsers, potentially stealing session cookies, redirecting users to malicious sites, or even gaining unauthorized access to additional system resources. The authenticated nature of the attack means that attackers do not need to rely on social engineering or other initial access methods, as they can exploit legitimate user accounts already established within the system. This makes the vulnerability particularly dangerous in enterprise environments where TIBCO EBX is used for business process management and workflow automation.
Organizations utilizing affected TIBCO EBX versions should implement immediate remediation measures to address this vulnerability. The primary mitigation strategy involves applying the latest security patches released by TIBCO Software Inc. to update the affected system components to versions that contain proper input validation and output encoding mechanisms. Additionally, network segmentation and access controls should be strengthened to limit the potential impact of successful exploitation attempts. Security monitoring should be enhanced to detect anomalous user behavior or suspicious content submissions that might indicate attempted exploitation of this vulnerability. Organizations should also consider implementing web application firewalls and content security policies to provide additional layers of protection against cross-site scripting attacks. The vulnerability's presence in multiple versions of the software highlights the importance of comprehensive patch management strategies and regular security assessments to identify and remediate similar vulnerabilities across the enterprise environment. This case demonstrates the critical importance of proper input validation and output encoding in web applications, as outlined in the OWASP Top Ten and MITRE ATT&CK framework's web application security categories, which emphasize the need for robust sanitization mechanisms to prevent XSS attacks.