Top 5 API Vulnerabilities of 2025 According to APISecurity.io

The APISecurity.io newsletter Issue 286 reviews the five most common API vulnerabilities seen across 2025, highlighting recurring security gaps that developers must fix. The top issue was missing authentication, where sensitive endpoints didn’t require any login, followed by Broken Object Level Authorization (BOLA), which lets attackers access other users’ data by tampering with identifiers. Excessive data exposure was also frequent, with APIs returning more fields than necessary. Broken function-level authorization allowed unauthorized role actions, and broken authentication mechanisms like weak password handling rounded out the list, showing that fundamental access controls remain the biggest API security risks of the year.

https://apisecurity.io/issue-286-the-apisecurity-io-top-5-api-vulnerabilities-in-2025/

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