CVE-2026-73957 in WebCenter Portal
Summary
by MITRE • 09/15/2026
Vulnerability in the Oracle WebCenter Portal product of Oracle Fusion Middleware (component: Portlet Services). 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 Portal. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle WebCenter Portal, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle WebCenter Portal accessible data as well as unauthorized access to critical data or complete access to all Oracle WebCenter Portal accessible data. CVSS 3.1 Base Score 9.3 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N).
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 09/15/2026
The identified vulnerability resides within the Portlet Services component of Oracle WebCenter Portal, a key element of the Oracle Fusion Middleware suite 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 9.3, indicating critical risk to confidentiality and integrity. The vulnerability allows an unauthenticated attacker who has network access via HTTP to compromise the Oracle WebCenter Portal application. While the initial point of entry is through standard web protocols, making it remotely exploitable without prior authentication credentials, the exploitation process requires human interaction from a victim other than the attacker. This social engineering aspect suggests that the attack likely involves诱骗 users into clicking malicious links or interacting with compromised content to trigger the exploit code within their browser session.
The technical nature of this flaw enables significant unauthorized actions against critical data and system resources. Successful exploitation results in the ability for an attacker to create, delete, or modify access controls on critical data as well as all Oracle WebCenter Portal accessible data. Furthermore, it grants unauthorized access to sensitive information, potentially leading to complete exposure of all portal-accessible data. The impact extends beyond the immediate application due to a scope change condition; while the vulnerability is technically located in Oracle WebCenter Portal, the consequences can significantly affect additional products within the broader enterprise environment. This lateral movement capability amplifies the risk profile, as compromising one component may lead to the compromise of interconnected systems or shared data stores.
From an industry standard perspective, this vulnerability aligns with CWE-79, which covers Cross-Site Scripting (XSS) vulnerabilities where untrusted input is not properly neutralized before being placed in a web page served to other users. The requirement for human interaction places it firmly within the ATT&CK technique of T1566.002, specifically Spearphishing Link attacks, where attackers send links that lead victims to malicious websites or trigger client-side exploits. Additionally, the ability to modify access controls and data points toward CWE-269, Improper Privilege Management, and CWE-732, Incorrect Permission Assignment for Critical Resource. The high confidentiality impact suggests potential exposure of sensitive business logic or user personal information stored within the portal infrastructure.
Mitigation strategies must address both immediate remediation and long-term security posture improvements. Oracle has likely released patches to update the Portlet Services component in the affected versions; organizations should prioritize applying these updates immediately to close the attack vector. In addition to patching, implementing strict input validation and output encoding mechanisms within custom portlets can help mitigate similar XSS-based flaws if new code is developed or existing configurations are modified. Network-level controls such as Web Application Firewalls (WAFs) configured with rulesets targeting common web exploitation patterns can provide an additional layer of defense by blocking malicious HTTP requests before they reach the application server. User awareness training is also critical, given the social engineering aspect of the attack; employees should be educated to recognize and report suspicious links or unexpected prompts that require interaction. Regular security audits and penetration testing focused on authentication bypasses and privilege escalation paths will further strengthen resilience against such vulnerabilities in Oracle Fusion Middleware environments.