CVE-2026-101499 in WebCenter Sites
Summary
by MITRE • 10/21/2026
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).
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 10/21/2026
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 represents a critical risk to organizations relying on this content management system for digital experience delivery. The core issue stems from an architectural weakness that permits unauthenticated actors to interact with the application server over standard HTTP protocols without requiring any form of user credentials or prior authentication. This lack of access control mechanisms allows external entities to bypass traditional security boundaries, effectively treating the vulnerable endpoints as publicly accessible resources despite their intended restricted nature.
From a technical perspective, the vulnerability enables an attacker to execute arbitrary actions within the context of the application server with elevated privileges. The ease of exploitation is categorized as low complexity in terms of attack vector requirements, meaning that no specialized conditions or user interaction are necessary beyond network connectivity. An adversary can leverage this flaw by sending crafted HTTP requests directly to the affected service endpoints. Upon successful execution, these malicious inputs allow the attacker to assume full control over the Oracle WebCenter Sites instance. This level of compromise is consistent with severe implementation flaws where input validation and authorization checks are either absent or incorrectly configured, allowing remote code execution or administrative takeover through standard web traffic.
The operational impact of this vulnerability is profound, as indicated by a CVSS 3.1 Base Score of 9.8 out of 10. This high severity rating reflects the complete compromise of confidentiality, integrity, and availability for the affected system. An attacker who successfully exploits this flaw can take over the Oracle WebCenter Sites environment, leading to unauthorized access to sensitive content, modification or deletion of website data, and potential disruption of services. The ability to achieve full administrative control means that attackers could inject malicious scripts into published pages, deface websites, steal user credentials stored within the system, or use the compromised server as a pivot point for further attacks against internal network resources. This scenario aligns with common attack patterns such as unauthorized access and privilege escalation found in industry frameworks like MITRE ATT&CK, particularly those involving web application exploitation techniques that bypass authentication controls.
To mitigate this risk, immediate action is required to apply the latest security patches provided by Oracle for the affected versions of Fusion Middleware. Organizations should verify their current deployment status against the supported version list and prioritize updates if running 12.2.1.4.0 or 14.1.2.0.0. In environments where patching cannot be implemented immediately, network-level controls such as firewall rules should restrict access to WebCenter Sites endpoints exclusively from trusted IP addresses. Additionally, implementing a web application firewall can help detect and block malicious HTTP requests that exhibit patterns associated with this vulnerability. Regular security audits and penetration testing are recommended to ensure that no other unauthenticated entry points exist within the middleware infrastructure, thereby reducing the overall attack surface and preventing similar exploitation vectors in the future.