Not collecting or logging sensitive information unless specifically required.High quality logs will often contain sensitive data, and must be protected as per local data privacy laws or directives. The objective is not to create massive amounts of logs, but high quality logs, with more signal than discarded noise.

The primary objective of error handling and logging is to provide useful information for the user, administrators, and incident response teams. It is difficult to provide robust input validation in certain scenarios, so the use of safer API such as parameterized queries, auto-escaping templating frameworks, or carefully chosen output encoding is critical to the security of the application.

With modern web application architecture, output encoding is more important than ever.

Output data is encoded or escaped as per the context of the data as close to the interpreter as possible.

Input data is strongly typed, validated, range or length checked, or at worst, sanitized or filtered.Input validation and output encoding architecture have an agreed pipeline to prevent injection attacks.

This weakness leads to almost all of the significant vulnerabilities in web applications, such as Cross-Site Scripting (XSS), SQL injection, interpreter injection, locale/Unicode attacks, file system attacks, and buffer overflows.Įnsure that a verified application satisfies the following high-level requirements: The most common web application security weakness is the failure to properly validate input coming from the client or the environment before directly using it without any output encoding.

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