Web Application Security: A Concise Overview for 2021


Security of web applications is one significant element that is often ignored in the creation of web apps. That’s comprehensible. Online application protection threats are often ignored or not properly focussed on between code creation, app management, and graphic design. Even, if you intend to go commercial with your app, web application protection how-to needs to be a significant priority. In this article, we will discuss, web application security, web application security tools, what are web application security best practices, web application security architecture, and web application security vulnerabilities.

In this article let us look at:

  1. What is Web Application Security?
  2. What are Web Application Security Vulnerabilities?
  3. Web Application Firewall (WAF)
  4. Web Application Security Checklist

1. What is web application security?

The concept of building websites to work as planned, even when they are under attack, is web application security. To protect its properties from potentially malicious agents, the definition requires a series of security controls built into a web application. Online applications invariably involve bugs, like all apps. Any of these bugs represent real vulnerabilities that can be abused, putting organizations at risk. Protection for web applications protects against such defects. Throughout the life cycle of software development, it includes exploiting safe development practices and enforcing security controls, ensuring that design-level vulnerabilities and implementation-level bugs are addressed.

2. What are web application security vulnerabilities?

Web application vulnerabilities are generally the result of a lack of sanitization of input/output, which is often used either to exploit source code or to gain unauthorized access.

Such vulnerabilities allow various attack vectors to be used:

  • SQL Injection happens when fraudulent SQL code is used by a perpetrator to manipulate a database backend such the information is revealed. Unauthorized accessing of lists, deletion of tables, and unauthorized administrative access are the consequences.
  • XSS is an injection attack targeted at users accessing accounts, activating trojans, or altering the content of the website. Cross-site scripting (XSS) Stored XSS happens when it explicitly injects malicious code into an application. Reflected XSS takes place when an application is reflected on a user’s browser by a malicious script.
  • Remote File Inclusion-This form of attack is used by a hacker to insert a file remotely into a web application server. This will result in the execution of unauthorized scripts or code within the software, as well as data-stealing or exploitation.
  • Cross-site Request Forgery (CSRF)-An assault that could lead to an unsolicited transfer of money, altered passwords, or theft of knowledge. It is triggered when a malicious web application causes an unauthorized action to be taken by a user’s browser on a site to which a user is logged on.

3. Web application firewall (WAF)

Hardware and software solutions used to protect against application security risks are web application firewalls (WAFs). To block attack attempts, these solutions are meant to inspect incoming traffic, thus compensating for any deficiencies in code sanitization.

By shielding data from theft and exploitation, WAF implementation fulfils a primary prerequisite for PCI DSS certification. Requirement 6.6 states that it is important that all credit and debit cardholder information contained in a database is safe.

In general, deploying a WAF does not entail any modifications to an application, as it is positioned at the edge of a network ahead of its DMZ. From there, it serves as a conduit for all incoming traffic until they have a chance to communicate with an application, blocking malicious requests.

4. Web application security checklist

  • Safety Evaluation for Dynamic Application:  This automated application security test is best for internally confronted, low-risk applications that must comply with regulatory security evaluations. Combining DAST with some manual web protection scanning for various bugs is the safest option for medium-risk apps and responsive applications undergoing minor modifications.
  • Safety evaluation for Static Application:  This approach to application protection provides automated and manual techniques for research. Without the need to execute applications in a production environment, it is best to find bugs.
  • Test of Penetration:  For critical applications, especially those experiencing major changes, this manual application security test is best. To discover advanced attack scenarios, the evaluation requires business logic and adversary-based testing.
  • Self-Security Technology Runtime:  This emerging approach to application security involves various technical strategies to incorporate an application so that attacks can be tracked in real-time as they are performed and, hopefully, blocked.


Protection of web applications, as the name implies, is the process of protecting cyber-attacks, hacks, and security threats against websites, web applications, and other internet-based services that exploit loopholes, misconfigurations, and vulnerabilities in these applications or their codes. A core component of every web-based organization is web application protection. The internet’s global existence exposes web resources to attack from multiple locations and to varying degrees of size and complexity.

Security for web apps explicitly describes the security of websites, web applications, and web services, such as APIs. Similar web application protection methods fix various vulnerabilities. Among the more comprehensive, web application firewalls (WAFs) protect against several forms of attack by controlling and filtering traffic between the web application and any user.

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