CVE-2026-83035 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 represents a critical risk to organizations relying on this platform for content management and digital experience delivery. The vulnerability is characterized by its high severity, with a CVSS 3.1 base score of 9.8, indicating that it allows an unauthenticated attacker to achieve complete system compromise through network access via the HTTP protocol. This classification underscores the immediate danger posed by the flaw, as no prior authentication or user interaction is required for exploitation, making it particularly dangerous in internet-facing deployments where such services are often exposed directly to external networks without sufficient perimeter controls.
From a technical perspective, the core of this vulnerability lies in insufficient input validation and access control mechanisms within the WebCenter Sites application logic. The flaw permits an attacker with network connectivity to send specially crafted HTTP requests that bypass security checks designed to restrict unauthorized actions. Because the attack vector is remote and requires no user interface interaction, it falls squarely into the category of automated exploitation tools commonly used by threat actors scanning for vulnerable instances on the internet. The absence of authentication requirements means that any entity capable of reaching the server over the network can attempt to exploit this weakness, significantly lowering the barrier to entry for malicious actors compared to vulnerabilities requiring local access or social engineering tactics.
The operational impact of a successful exploitation is severe and comprehensive, encompassing all three pillars of the CIA triad: confidentiality, integrity, and availability. As indicated by the high scores in these categories within the CVSS vector, an attacker who successfully exploits this vulnerability can take full control of the Oracle WebCenter Sites instance. This takeover typically results in unauthorized access to sensitive data stored or processed by the application, leading to significant breaches of confidential information such as customer records, proprietary content, and internal communications. Furthermore, the integrity impact implies that attackers can modify existing content, inject malicious scripts, or alter system configurations at will, potentially defacing websites or distributing malware through compromised pages. The availability impact suggests that the attacker could also disrupt service by crashing application processes or consuming excessive resources, leading to denial of service conditions for legitimate users.
In terms of industry-standard classifications, this vulnerability aligns with CWE-287, which describes Improper Authentication, and potentially CWE-918, Server-Side Request Forgery (SSRF) if the exploitation involves manipulating server-side requests to access internal resources. The attack pattern is consistent with MITRE ATT&CK technique T1059, Command and Scripting Interpreter, as gaining control of a web application often leads to arbitrary code execution on the underlying operating system. Additionally, it relates to T1133, External Remote Services, given that the entry point is an externally accessible network service. Understanding these mappings helps security teams contextualize the threat within broader attack frameworks and prioritize remediation efforts based on established best practices for preventing authentication bypasses in web applications.
Mitigation strategies must focus on immediate patching and robust defensive measures to reduce exposure while updates are applied. The primary recommendation is to apply the latest security patches provided by Oracle, which address the specific code flaws allowing unauthorized access. Organizations should ensure that their vulnerability management processes include regular scanning for this CVE across all supported versions of WebCenter Sites. In addition to patching, implementing strict network segmentation and firewall rules can limit exposure by restricting HTTP access to only trusted IP addresses or internal networks where possible. Deploying a Web Application Firewall (WAF) with updated rule sets capable of detecting and blocking the specific exploit patterns associated with this vulnerability provides an additional layer of defense. Regular security audits and penetration testing should also be conducted to identify any misconfigurations that might exacerbate the risk, ensuring that authentication mechanisms are correctly enforced even if underlying code vulnerabilities exist.