Benefits of Web Application Security

Web applications play a vital role in business success and are an attractive target for cybercriminals.

Uncover vulnerabilities

The best defense is a good offense. Our team of penetration testers will assess your application and you will be made aware of every security hole that could lead to compromised applications and data breaches. This provides you with the foresight needed to fortify your web application and keep your most sensitive assets where they belong.

Maintain trust

A cyber assault or data breach negatively affects the confidence and loyalty of your customers, suppliers and partners. However, if your company is known for its strict and systematic security reviews and penetration tests, you will reassure all your stakeholders.

Test your cyber-defence capability

You should be able to detect attacks and respond on time. Once you detect an intrusion, you should start investigations, discover the intruders and block them. Whether they are malicious, or experts testing the effectiveness of your protection strategy. Our feedback from the test will tell what actions can be taken to improve your defence.

Top 10 Web Application Security Risks

Our Web Application Penetration Tests methodologies simulate real world attacks, aligning with the Open Web Application Security Project (OWASP), OSSTMM and PTES. Our web application security testing team will help to identify vulnerabilities including:

Broken Access Control

Attackers can exploit these flaws to access unauthorized functionality and/or data, such as access other users’ accounts, view sensitive files, modify other users’ data, change access rights, etc.

Sensitive Data Exposure

Many web applications and APIs do not properly protect sensitive data, such as financial, healthcare, and PII.

Broken authentification and Session management

Application functions related to authentication and session management are often implemented incorrectly, allowing attackers to compromise passwords, keys, or session tokens.

Injection flows

Injection flaws, such as SQL, NoSQL, OS, and LDAP injection, occur when untrusted data is sent to an interpreter as part of a command or query.

Security Misconfiguration

This is commonly a result of insecure default configurations, incomplete or ad hoc configurations, open cloud storage, misconfigured HTTP headers, and verbose error messages containing sensitive information.

Insecure Deserialization

The impact of deserialization flaws cannot be overstated. These flaws can lead to remote code execution attacks, one of the most serious attacks possible.

Using Components with Known Vulnerabilities

Applications and APIs using components with known vulnerabilities may undermine application defenses and enable various attacks and impacts.

Insufficient Logging & Monitoring

Insufficient logging and monitoring, coupled with missing or ineffective integration with incident response, allows attackers to further attack systems, maintain persistence, pivot to more systems, and tamper, extract, or destroy data.

Our Web Application Security Testing Methodology

Zeroday.PRO Labs operates under a structured, repeatable methodology. We prioritize this concept in each engagement to make certain that our assessment is reliable, reproducible, and top-notch in quality. As such, our findings can always be verified by your team, before and after the remediation. To get these results, we are guided by the following steps:


This is where all requirements are gathered and goals are set. It’s where types of tests, forms, timelines and limitations are codified and agreed. We utilize our own SecurePortal to ensure that all of the required scoping documents are securely transmitted between the client and the company.



In this phase, we will utilise both Passive and Active Information Gathering. Our consultants will collect as much information as they can on the target, employing a myriad of OSINT (Open Source Intelligence) tools and techniques.



The assessment phase aims to check known vulnerabilities against the operating systems and services that have been identified as present in the network. Attempts are also made to exploit common operating system vulnerabilities to check the level of privileged access that can be achieved.



We have developed a comprehensive reporting format that provides optimal insight into our work. The summary lists the key findings along with the top ten recommendations for remedial action. A table of hosts is provided together with the total number of vulnerabilities identified at each severity level.



The full assessment report will be created and uploaded to our SecurePortal for review prior to scheduling a de-brief call. The call or meeting is an opportunity for you to discuss any major issues arising from the assessment with the lead consultant who will formally present the findings of the report.



We are happy to re-examine the security weaknesses to ensure that the defense mechanisms have been implemented correctly. This process activity is always free of charge.

Manual vs Automated Penetration Testing

We apply manual analysis, cutting-edge methodologies, the best pentesting software, and our unique pentest report generation tool.

Frequently asked questions about Web Application Pentesting

What is web application penetration testing?

A web application penetration test is a type of ethical hacking assessment designed to assess the architecture and design of web applications in order to identify cyber security risks that could lead to unauthorised access and data exposure of your high-risk cyber assets.

Who performs a web application penetration test?

Zeroday.PRO web application penetration testing is performed by our team of Offensive Security certified team, who possess an in-depth understanding of the latest threats and adversarial techniques.

What information is needed to scope a web app pentest?

The information needed to help scope a web application security test typically includes the number and types of web applications to be tested, number of static and dynamic pages, number of input fields and whether the test will be performed from an unauthenticated and or/authenticated perspective (where login credentials are unknown/known).

What web application security testing tools are used?

Penetration testing for web applications not only requires knowledge of the latest web application security testing tools but also a deep understanding of how to use them most effectively. To assess web app security, ethical hackers leverage a range of offensive tools to perform traffic interception and modification, Cross-Site Scripting, SQL injection, and more.

How long does a web application security test take?

The time it takes an ethical hacker to complete a web application penetration test depends on the scope of the test, including the number and type of web apps, static or dynamic pages and input fields.

What happens at the end of a web app pentest?

After each web application security test, the ethical hacker(s) assigned to the test will produce a custom written report, detailing any weaknesses identified, associated risk levels and recommended remedial actions.

How much does a web application penetration test cost?

The cost of a web application penetration test is determined by the number of days our ethical hackers require to fulfil the agreed scope of the engagement. As part of the initial scoping process, a quote is produced upon completion and return of a short pre-evaluation questionnaire.

Why should I use Zeroday.PRO?

Zeroday.PRO team hold certifications from the leading industry organizations, including Offensive Security Certified Expert 3 (OSCE3), Offensive Security Experienced Penetration Tester (OSEP), Offensive Security Certified Professional (OSCP) and more. Our security engineers are hugely experienced at performing network security testing and website security testing and can help your organisation to identify vulnerabilities in a range of programming languages and environments.