Have you ever found vulnerabilities yourself? Did you find any?

Yes, in my practice I have had to independently search for vulnerabilities, especially when conducting security audits and code reviews. This often involves analyzing input data, checking for SQL injections, XSS, improper session management, and access rights.

For example, once I discovered a vulnerability related to insufficient validation of user input, which allowed SQL injection through a search form. After identifying the issue, we implemented prepared statements and improved data filtering.

Such experience helps not only in finding vulnerabilities but also in preventing their appearance in the future, thereby improving the quality and security of applications.