Crossbow Labs

Web Application Penetration Testing

Test your SaaS and take proactive measures to secure it from threats. Include industry best practices for hosting and technology configurations. 

Why web application penetration testing

The frequency of cyber-attacks against web applications increases year over year, making the financial losses, Sensitive data leaks from the successful attacks. Web application penetration testing is the process of identifying the vulnerabilities/ loopholes in the target web application using manual testing/automated tools.

Standards and Testing Methodology: CBL follows Web application standards like OWASP top 10-2021, Sans25/CWE Top 25. The assessment evaluates the infrastructure from an external attacker’s perspective and tests against best practice criteria to validate security mechanisms and identify potential loopholes in the system. The assessment was conducted in accordance with the recommendations outlined in the Open Web application Security Project (OWASP) and Application Security Verification Standard (ASVS). The testing methodology will be based on OWASP testing guide V4.2.

Tools used for Web application pentesting are Burpsuite, Nessus, Waybackurls, Gobuster/FFuF, Nikto, SQLmap, Nmap, Metasploit framework, hydra, hash cat, etc.

How can CBL help?

CBL advises companies to remediate all vulnerabilities revealed during Web Application Penetration testing. It is best practice to remediate Critical, high vulnerabilities first and focus on Medium and Low afterward.

CBL also offers to debrief calls with customers if they have queries during remediation phases. Experts in CBL work closely with development teams to resolve all issues identified.

Based on the contract agreement, CBL also offers Multiple retests along with assistance in the remediation phase.

Application pentest - Services

Compliance Testing

Organizations which require penetration testing of the applications 

SaaS testing

CBL has highly skilled Security Engineers worked with multiple organizations covering banks, government sectors, National Informatics Centre (NIC), Telecom, E-Commerce, Retailing, Manufacturing, and IT/ITES.

Periodic Testing

Our Security Engineers hold accreditations such as CEH (Certified Ethical hacker), and OSCP (Offensive Security Certified Professional). And honoured by Bug bounty programs from various 100+ fortune companies.

Bespoke Security Testing

Penetration testing has a karmic cycle of running for ever, so much so that there are tools to do continuous pen-tests. However, we are closer to the real world where we have a requirement to meet timelines. 

industry experience

Most of our compliance and consulting programs include technology evaluations which require carrying out Penetration Tests

Compliance Management tool

Our Automated approach in providing report, exchanging documents and workflow management saves lot efforts and keeps us away from audit fatigue

Enterprise grade testing

Our PT teams have built a database of over 200 test cases for popular SaaS technologies which will help discover various vulnerabilities. 


Application Penetration Testing - Approach

Customized approaches - special requests - Prioritized scheduling

1. Information gathering

This is a very critical first step in casing the joint. We understand the details of the application and its features.

2. Developing test cases

Specific test cases that could be deployed to compromise the Confidentiality - Integrity and Availability will be created and tested.

3. Vulnerability discovery & Exploitation

The heuristics of hosting, platforms used for development, technology architecture will be analysed for vulnerabilities and a relevant POC will be done.

4. Risk Analysis

Risks which are inherent by virtue of technology limitations, data flow and coding incongruence will be identified and treated.

5. Reporting

All the findings will be reported along with possible solutions and the proof of concept.

6. Continued Support

Periodic calendars for testing may be set and a continuous testing cycle will kick in, for maintaining the most optimal security posture.


Cyber-attacks are increasing day by day, which may lead to sensitive user data leaking and web application defacing, which may result in financial loss. Penetration testing will identify the Vulnerabilities and business impact about the potential attacks against the website.

This really depends on the lifecycle of your application or SaaS offering. It is ideal to test on the production environment, which is also required by many compliance standards, to ensure that real world deployments are secured from real world threats. It is also wise to test the deployments on a test bed before launch, when there are new updates or other additions. 

The best time will be when there is lower traffic to the targeted applications. Most penetration tests are done on a Staging Environment and the final fixes are done on the production. Testing on production will then not result in grave outages. 

Penetration testing ought to be performed consistently (no less than one time each year) to guarantee more reliable IT and organization security on the board by uncovering how newfound dangers (0-days) or arising weaknesses may be taken advantage of by vindictive programmers

Penetration testing can be done various layers of the ISO – OSI model. Application penetration tests are aimed at the upper layers to check for protocol security, application security and intended functionality. 

Talk With an Expert

Learn more about how crossbow labs can help protect your business. Contact us today.