Significant API Security Incidents Highlight Vulnerabilities in Legacy Systems

• •A legacy Stripe API endpoint was exploited in a web-skimming campaign affecting 49 retailers.
• •The attack exploited improper asset management and broken authentication vulnerabilities.
• •Organizations test only 38% of their APIs for vulnerabilities, leaving many exposed.

In 2026, the API management market is projected to generate approximately $9.7 billion, making APIs a critical attack surface. A notable incident involved a legacy Stripe API endpoint that was exploited in a web-skimming campaign affecting at least 49 online retailers. Attackers abused this deprecated endpoint, which lacked modern security controls, to conduct a large-scale card-testing operation. The incident underscored the risks associated with improper asset management and broken authentication vulnerabilities. Security audits often overlook such legacy systems, leaving them exposed. Organizations typically test only 38% of their APIs for vulnerabilities, further compounding the issue. The incident serves as a case study for security professionals to improve API security strategies. It emphasizes the need for comprehensive visibility and management of digital assets throughout their lifecycle.