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Home/Case Studies/Securing Open Banking & UPI APIs for a Leading Private Bank
API Security
SecureNexus APIPOS
Leading Private Sector Bank

Securing Open Banking & UPI APIs for a Leading Private Bank

Assessed and secured 8,000+ APIs across mobile banking, UPI payments, account aggregation, and open banking integrations. Uncovered critical IDOR and mass assignment vulnerabilities in core banking flows.

Key Impact

8,000+ APIs Secured

The Challenge

What They Were Facing

A leading private sector bank with 30M+ digital customers operated 8,000+ APIs powering mobile banking, UPI payments, loan origination, and account aggregator integrations. RBI's evolving digital banking security guidelines mandated comprehensive API security assessments, but the bank's API estate had grown far faster than the security team could keep up with.

8,000+ APIs across mobile banking, UPI, and open banking with no unified security view.

RBI mandating API security assessments for all customer-facing digital channels.

IDOR vulnerabilities in account inquiry APIs allowing cross-customer data access.

The Solution

How We Solved It

SecureNexus APIPOS was deployed enterprise-wide to discover, test, and monitor all banking APIs. The platform identified critical IDOR and mass assignment vulnerabilities in core banking APIs, put API governance policies in place, and provided continuous compliance monitoring aligned with RBI digital banking guidelines.

API Discovery

8,000+ endpoints across all digital channels

IDOR Detection

Cross-customer data access testing

RBI Compliance

Digital banking security alignment

Results

Measurable Impact

Quantified outcomes from this engagement.

8,000+ APIs

Enterprise-Wide Coverage

31 Critical

Vulnerabilities Remediated

RBI Compliant

Digital Banking Guidelines

8,000+APIs Secured

Complete API security coverage across mobile banking, UPI, loans, and open banking integrations.

31Critical Flaws Fixed

IDOR, mass assignment, and broken function-level authorization vulnerabilities fixed.

“With 8,000+ APIs and millions of daily transactions, we needed a platform that could discover and test at scale. SecureNexus found IDOR vulnerabilities in our core banking APIs that traditional testing had completely missed.”
C

Chief Information Security Officer

Leading Private Sector Bank

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