CVE-2026-83037 in WebCenter Sites
Summary
by MITRE • 09/16/2026
Vulnerability in the Oracle WebCenter Sites product of Oracle Fusion Middleware (component: WebCenter Sites). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle WebCenter Sites. Successful attacks of this vulnerability can result in takeover of Oracle WebCenter Sites. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Oracle WebCenter Sites component of the Oracle Fusion Middleware suite, specifically affecting versions 12.2.1.4.0 and 14.1.2.0.0. This security flaw is characterized by its high severity, with a CVSS 3.1 Base Score of 9.8, indicating critical risk to confidentiality, integrity, and availability. The vulnerability allows for unauthenticated exploitation via network access through the HTTP protocol, meaning that no prior authentication or user interaction is required to initiate an attack. This lack of access control requirements significantly lowers the barrier for entry, enabling any remote attacker with network connectivity to target the system directly without needing valid credentials or social engineering tactics such as phishing.
From a technical perspective, this vulnerability represents a severe failure in input validation and security configuration within the WebCenter Sites application layer. The ability to achieve full takeover of the Oracle WebCenter Sites environment suggests that the flaw likely involves improper handling of user-supplied data or insecure default configurations that expose administrative functions to public access. Such conditions typically align with CWE-284, Improper Access Control, and potentially CWE-79, Cross-site Scripting if client-side code injection is involved in the takeover mechanism. The high availability impact indicates that successful exploitation can lead to service disruption, while the confidentiality and integrity impacts suggest that attackers can exfiltrate sensitive data or modify content stored within the system without detection.
The operational impact of this vulnerability is profound for organizations relying on Oracle Fusion Middleware for their digital experience management needs. A successful compromise results in complete control over the WebCenter Sites instance, allowing an attacker to manipulate website content, inject malicious scripts into published pages, steal user session tokens or database credentials stored within the application context, and potentially use the compromised server as a pivot point for further attacks against internal network resources. This level of access effectively neutralizes the security posture of the affected system, turning it into a tool for data theft, defacement, or distributed denial-of-service operations. The ease of exploitation means that automated scanning tools can rapidly identify vulnerable instances across the internet, leading to widespread compromise if left unpatched.
In terms of threat modeling and industry frameworks, this vulnerability maps closely to MITRE ATT&CK techniques related to Initial Access via web applications, such as T1190 Exploit Public-Facing Application. The lack of authentication requirements places it in the category of attacks that do not require user interaction or privilege escalation prior to exploitation. Organizations must recognize that public-facing middleware components are frequent targets for automated botnets seeking high-value entry points into enterprise networks. The severity score reflects the comprehensive nature of the compromise, where a single exploit can lead to total system subversion rather than limited data exposure.
Mitigation strategies should prioritize immediate remediation through the application of official security patches provided by Oracle for versions 12.2.1.4.0 and 14.1.2.0.0. Until patching is feasible, organizations should implement strict network-level controls to restrict HTTP access to WebCenter Sites components exclusively from trusted internal IP ranges or specific administrative subnets. Deploying a Web Application Firewall with rulesets tuned for common web application attack patterns can provide an additional layer of defense by blocking malicious payloads before they reach the vulnerable application logic. Furthermore, conducting regular vulnerability scans and penetration tests focused on middleware configurations is essential to identify similar misconfigurations in other supported versions or related components within the Fusion Middleware stack.