Dynamic Application Security Testing

Definition of Dynamic Application Security Testing

Dynamic Application Security Testing (DAST) is a security testing methodology that assesses web applications in their running state to identify potential vulnerabilities. It involves simulating real-world attack scenarios by interacting with the application’s user interface, APIs, and backend network connections. This approach helps uncover security flaws that may not be detected using static analysis or source code reviewing alone.


The phonetic pronunciation of the keyword “Dynamic Application Security Testing” is:Dye-nam-ik Apli-key-shun Sih-kyur-i-tee Tes-ting

Key Takeaways

  1. Dynamic Application Security Testing (DAST) involves actively probing a running application to identify security vulnerabilities, which helps protect an application against potential cyber attacks.
  2. DAST is particularly effective at identifying issues such as SQL injections, Cross-Site Scripting (XSS), security misconfigurations, and other vulnerabilities that may occur at runtime.
  3. While DAST is efficient in finding real-world attack vectors, it should be used in conjunction with other testing methods like Static Application Security Testing (SAST) and Interactive Application Security Testing (IAST) to ensure comprehensive application security coverage.

Importance of Dynamic Application Security Testing

Dynamic Application Security Testing (DAST) is an essential technology term in the realm of software development and cybersecurity, primarily due to its role in detecting security vulnerabilities in web applications during their run-time.

By identifying weaknesses in applications as they are in use, DAST allows developers to address potential threats and instill the necessary security measures promptly.

As opposed to static application security testing, DAST actively simulates cyberattacks, thereby providing a more accurate analysis of real-world risks.

As the digital landscape evolves and the frequency and complexity of cyberattacks grow, securing web applications has become increasingly critical for businesses and users alike.

Therefore, DAST offers a valuable layer of protection and significantly contributes to building safe, secure, and reliable online experiences.


Dynamic Application Security Testing (DAST) serves as an essential component in the realm of application security, primarily focusing on the detection and mitigation of potential vulnerabilities within web applications. The fundamental purpose of DAST is to simulate real-world attack scenarios, thereby enabling organizations to identify and rectify potential weak points within their applications before malicious hackers can exploit them.

Conducted during the application’s runtime, DAST scans the system, observes its behaviors, and analyzes responses to various security threats, making it an integral aspect of a comprehensive security framework that ensures robust and secure applications. Employing DAST within an organization’s security testing strategy offers numerous benefits, including bolstering the resilience of their applications and safeguarding sensitive data.

For instance, DAST can be highly effective for identifying common security vulnerabilities such as SQL injections, Cross-Site Scripting (XSS), and authentication flaws. By assessing the application’s interactions with external databases, users, and other systems, it provides a deep insight into potential security lapses that may be exploited by cybercriminals.

This ultimately enhances an organization’s ability to proactively address these security concerns, ensuring the reliability and integrity of their applications while maintaining a strong reputation among customers and partners that rely on their services.

Examples of Dynamic Application Security Testing

Banking and Financial Industry:In the banking and financial industry, numerous online transactions occur daily, making security a top priority. Many banks have adopted Dynamic Application Security Testing (DAST) to continuously monitor web applications for vulnerabilities and security threats. For example, Capital One is known to utilize DAST to detect security flaws, regularly test their applications, and ensure secure transactions for their customers.

E-commerce Platforms:E-commerce platforms like Amazon, eBay, and Shopify handle millions of users and a vast amount of sensitive personal and financial data. Using DAST, these platforms can actively scan web applications to identify vulnerabilities such as SQL injections, Cross-Site Scripting (XSS), and other potential security risks. This helps them to protect customer data, follow security compliance standards, and maintain customer trust.

Healthcare Industry:The healthcare industry has been going through digital transformation and now relies heavily on web applications and technology for managing patient data and supporting telemedicine. Companies like Cerner and Epic Systems, which develop Electronic Health Record (EHR) systems, use DAST to ensure a high-security level in their applications. This way, they protect sensitive patient information and medical records while complying with regulations like Health Insurance Portability and Accountability Act (HIPAA).

Dynamic Application Security Testing FAQ

What is Dynamic Application Security Testing (DAST)?

Dynamic Application Security Testing, or DAST, is a method used to identify security vulnerabilities in web applications while they are running in production. It tests the application from the outside in by simulating a hacker’s attack methods, helping developers identify potential weaknesses in their applications’ security features.

When should DAST be implemented?

DAST should be implemented as part of a comprehensive security-testing strategy. It is especially useful during the later stages of the development life cycle, when applications are nearing the production environment or are already live. Regular DAST scans will help ensure the ongoing security and integrity of an application.

What are the main benefits of DAST?

Some key benefits of DAST include its ability to identify vulnerabilities in real-time, test applications while running in production, and simulate real-world attack scenarios. By testing applications from an outsider’s perspective, DAST can help developers find and fix security issues before they can be exploited by hackers.

How does DAST differ from Static Application Security Testing (SAST)?

While both DAST and SAST help identify security vulnerabilities, they are used at different stages of the development process and test applications in different ways. SAST analyzes an application’s source code, performing a “white box” test to identify potential vulnerabilities. On the other hand, DAST simulates attacks on a running application, using a “black box” testing approach to find security issues. Both tools are valuable components of a comprehensive application security testing strategy.

Is DAST suitable for all types of applications?

Though DAST is highly effective in identifying security vulnerabilities in web applications, it may not be the best fit for certain types of applications, such as standalone or thick client applications. However, when combined with other methods like SAST and Interactive Application Security Testing (IAST), DAST can help create a more comprehensive and effective application security testing strategy.

Related Technology Terms

  • Automated Penetration Testing
  • Vulnerability Detection
  • Continuous Security Monitoring
  • Runtime Application Self-Protection (RASP)
  • Web Application Firewall (WAF)

Sources for More Information


About The Authors

The DevX Technology Glossary is reviewed by technology experts and writers from our community. Terms and definitions continue to go under updates to stay relevant and up-to-date. These experts help us maintain the almost 10,000+ technology terms on DevX. Our reviewers have a strong technical background in software development, engineering, and startup businesses. They are experts with real-world experience working in the tech industry and academia.

See our full expert review panel.

These experts include:


About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

More Technology Terms

Technology Glossary

Table of Contents