Enterprise Security Audit for Financial Analytics Platform

Chaikin Analytics, a financial analytics firm serving institutional investors and wealth managers, was undergoing a significant organizational restructuring that introduced new infrastructure, new personnel with elevated access, and migration between cloud environments. The executive team recognized that this transition period represented a critical window of vulnerability. Legacy authentication systems built on older session management patterns had never been formally audited. API endpoints serving real-time market data lacked rate limiting and input validation on several parameters. The firm's compliance team flagged that existing security documentation was insufficient for upcoming SOC 2 Type II audit requirements. With sensitive financial data flowing through the platform daily, including portfolio positions, trading signals, and client PII, any breach during the restructuring could have resulted in regulatory action, client attrition, and reputational damage. The timeline was aggressive: the restructuring was scheduled to complete within 90 days, and all security gaps needed to be identified and remediated before the new organizational structure went live.

BeyondScale deployed a three-person security team on a 6-week engagement structured into three phases: reconnaissance and threat modeling, active penetration testing, and remediation validation. During the reconnaissance phase, we mapped the complete attack surface including 47 API endpoints, 3 web applications, 2 mobile apps, and the underlying AWS infrastructure spanning 12 services. We identified the authentication flow as the highest-risk area given the organizational changes affecting user provisioning.

The active testing phase used Burp Suite Professional for web application testing, custom Python scripts for API fuzzing, and manual testing for business logic vulnerabilities. We discovered 4 critical vulnerabilities including a broken object-level authorization (BOLA) flaw that allowed authenticated users to access portfolio data belonging to other clients by manipulating account ID parameters. We also found an insecure direct object reference in the document download endpoint, a session fixation vulnerability in the SSO implementation, and an SQL injection vector in the legacy reporting module.

Beyond the critical findings, we identified 11 high-severity issues including missing CSRF protections on state-changing operations, overly permissive CORS configurations, and API keys embedded in client-side JavaScript. We documented 23 medium and low-severity findings covering HTTP security header gaps, verbose error messages leaking stack traces, and outdated TLS configurations.

For each finding, we provided detailed reproduction steps, risk scoring using CVSS v3.1, and specific remediation guidance with code examples where applicable. We worked directly with Chaikin's engineering team during a 2-week remediation sprint, validating each fix through retesting. The final deliverable was a 180-page security audit report formatted to meet SOC 2 Type II evidence requirements, including executive summary, technical findings, remediation status, and residual risk assessment.