CVE-2026-83383 in HRMS
Summary
by MITRE • 10/21/2026
Vulnerability in the Oracle HRMS (US) product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle HRMS (US). Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle HRMS (US) accessible data. CVSS 3.1 Base Score 6.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).
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Analysis
by VulDB Data Team • 10/22/2026
The identified vulnerability resides within the Internal Operations component of Oracle HRMS for US, a critical module within the broader Oracle E-Business Suite ecosystem. This security flaw affects supported software versions ranging from 12.2.3 through 12.2.15, indicating that it is present in multiple releases and has likely persisted across several update cycles without adequate remediation by the vendor or administrators. The nature of this vulnerability allows for exploitation by an attacker who possesses only low-level privileges within the system, significantly lowering the barrier to entry compared to vulnerabilities requiring administrative access. This characteristic aligns with common patterns where insufficient privilege separation or improper validation of user roles enables lateral movement or data exfiltration from accounts that should have restricted capabilities.
From a technical perspective, the vulnerability is exploitable via network access through the HTTP protocol, suggesting that it may involve web application logic flaws such as insecure direct object references, broken access control mechanisms, or insufficient input validation in server-side processing of HTTP requests. The attack vector being remote and requiring no user interaction means that an attacker can potentially trigger the exploit automatically without needing to deceive a legitimate user into clicking malicious links or opening infected files. This automation capability increases the risk profile substantially as it allows for scalable attacks against multiple targets simultaneously if exposed systems are discovered via internet scanning tools.
The operational impact of successfully exploiting this vulnerability is severe, primarily centered around confidentiality breaches rather than integrity or availability disruptions. Successful exploitation results in unauthorized access to critical data within the HRMS environment and can escalate to complete access to all Oracle HRMS accessible data. Given that Human Resources Management Systems contain highly sensitive personally identifiable information including social security numbers, bank account details, salary histories, performance reviews, and medical records, such a breach represents a catastrophic failure of data protection controls. The CVSS 3.1 base score of 6.5 reflects this significant confidentiality impact while acknowledging the requirement for low privileges to initiate the attack. This scoring indicates that while the vulnerability is serious enough to warrant immediate attention due to its potential for widespread data exposure, it does not currently pose an immediate threat to system availability or integrity in most standard configurations.
In terms of industry-standard classification frameworks, this vulnerability maps closely to CWE-269 Improper Privilege Management and potentially CWE-862 Missing Authorization depending on the specific technical mechanism involved. The ability for a low privileged user to access data beyond their scope suggests a failure in enforcing role-based access controls at the application logic level rather than just infrastructure permissions. Furthermore, within the MITRE ATT&CK framework, this behavior aligns with techniques related to Collection and Exfiltration over C2 channels if the attacker uses the initial foothold to move laterally or exfiltrate data. It also relates to Initial Access vectors where web-based applications are targeted due to their exposure to external networks.
Mitigation strategies must prioritize immediate patching of all affected Oracle E-Business Suite instances running versions 12.2.3 through 12.2.15 with the latest security patches provided by Oracle. Organizations should verify that internal operations modules are updated according to Oracle Critical Patch Update advisories specifically addressing this vulnerability. In addition to applying vendor-supplied fixes, administrators should review and harden access control policies within HRMS to ensure strict adherence to least privilege principles. Network segmentation strategies should be employed to restrict HTTP access to the application from untrusted networks wherever possible, utilizing web application firewalls to detect and block anomalous request patterns that might indicate exploitation attempts. Continuous monitoring of system logs for unusual data retrieval activities by low-privileged accounts is also recommended to identify potential compromise early in the attack lifecycle.