CVE-2026-73948 in WebCenter Portal
Summary
by MITRE • 09/15/2026
Vulnerability in the Oracle WebCenter Portal product of Oracle Fusion Middleware (component: Composer). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle WebCenter Portal. While the vulnerability is in Oracle WebCenter Portal, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle WebCenter Portal. CVSS 3.1 Base Score 9.9 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Composer 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 represents a critical risk to enterprise environments relying on these specific releases for content management and portal services. The vulnerability is characterized by its ease of exploitation, requiring only low-privileged access over the network via HTTP protocols. This accessibility significantly lowers the barrier for entry, allowing attackers who have gained minimal initial foothold within an organization's network perimeter to escalate their privileges effectively. The presence of this flaw in a widely deployed middleware component underscores the potential for widespread disruption across organizations that depend on Oracle WebCenter Portal for digital experience management and internal communications infrastructure.
From a technical perspective, the core issue lies in insufficient validation or access control mechanisms within the Composer module, which facilitates content creation and editing. This deficiency allows an authenticated attacker with low privileges to execute unauthorized operations that compromise the integrity of the application state. The operational impact is severe, as successful exploitation leads directly to the complete takeover of Oracle WebCenter Portal. This means the attacker gains administrative-level access, enabling them to modify portal structures, inject malicious content, or manipulate user sessions at will. Such a scenario effectively neutralizes the security controls intended to protect sensitive corporate data and digital assets hosted on the platform. The high severity is reflected in the CVSS 3.1 Base Score of 9.9, indicating critical risk due to high impacts on confidentiality, integrity, and availability.
The scope change associated with this vulnerability further amplifies its danger level. Although the flaw originates within Oracle WebCenter Portal, the attack vector allows for lateral movement or impact propagation to additional products integrated with or dependent upon the portal infrastructure. This cross-product impact means that compromising a single instance of WebCenter Portal can serve as a pivot point for broader network compromise, potentially exposing other critical systems such as databases, application servers, or identity management services connected to the middleware environment. The vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H confirms that the attack is remote, requires low complexity and privileges, involves no user interaction, but exhibits a changed security scope with high impacts across all three CIA triad dimensions.
In terms of industry standard classification, this vulnerability aligns closely with CWE-269 Improper Privilege Management or CWE-862 Missing Authorization, depending on the specific technical root cause within the Composer logic. It also maps to MITRE ATT&CK techniques related to Initial Access via Valid Accounts and potentially Lateral Movement if the scope change allows for further exploitation of connected systems. The lack of user interaction requirement makes it particularly dangerous in automated attack scenarios where bots can scan for vulnerable instances without needing social engineering or physical access.
Mitigation strategies must prioritize immediate patching to the latest available version that addresses this specific flaw, as Oracle typically releases security patches through its Critical Patch Update cycle. Organizations should verify their current deployment versions against the affected list of 12.2.1.4.0 and 14.1.2.0.0. In environments where immediate patching is not feasible due to operational constraints, network segmentation strategies should be implemented to restrict HTTP access to the Composer component strictly from trusted internal subnets or specific application servers that require it. Additionally, enforcing multi-factor authentication for all administrative accounts and applying strict role-based access control can help limit the impact of low-privileged account compromise. Continuous monitoring using intrusion detection systems configured to detect anomalous behavior patterns associated with privilege escalation attempts within WebCenter Portal is also recommended to identify potential exploitation activities in real time.