All the serious breaches that you have read about most likely began with an application bug. Hackers do not simply seek out poorly written passwords: they strike at the applications that your business uses: web portals, e-commerce platforms, mobile apps, and the internal applications that support your business.

 One weakness can be used to reveal sensitive information, monetary dealings, or business infrastructure. The average price of a data breach in the U.S. is $9.44 million and most data breaches are traced to the flaws in the applications, such as poorly configured APIs, weak security controls, or insecure libraries. The solution? Application Penetration Testing (App Pentesting) is a more realistic, manual, and expert-oriented kind of testing that identifies exploitable vulnerabilities before attackers do.

One of the questions that the security leaders would have been required to answer is how to find and fix the vulnerabilities before they are exploited by the attackers. The answer to this would be the application penetration testing (app pentesting), which is a disciplined and professional level test that assumes that the attackers in the real world are attempting to crack into applications.

This blog discusses why application penetration testing is a key element in averting real-life breaches, application penetration testing methodology, and why the technique should be incorporated into a security program within any organization.

What is Application Penetration Testing?

Application penetration testing is a simulated attack that security experts undertake on web-based, mobile-based, desktop, and API based applications. It is not only about finding vulnerabilities but also about showing how they may be used to attack the data or systems.

Penetration testing is contextual validation, unlike automated vulnerability scans that produce lists of possible problems. It answers questions such as:

• Can this SQL injection actually extract sensitive data?
  
• Could broken access control allow privilege escalation?
  
• Would an attacker be able to bypass authentication and impersonate users?
  

Penetration testing by copying actual patterns of attack will go beyond detection. It offers practical recommendations that enable the teams to know the actual business risk of each vulnerability.

Why Applications Are High-Value Targets

Applications are exposed to millions of users across the internet, making them prime attack surfaces. Three factors drive their attractiveness to attackers:

1. Expanding Attack Surface

Organizations are currently using a combination of on-prem, cloud, and SaaS applications. Both of them generate new endpoints, APIs, and integrations that can be attacked by attackers.

2. Common Weaknesses

Applications are often poorly configured, have inadequate authentication systems, and use libraries that have not been updated. A single weakness is enough to allow lateral movement within corporate networks.

3. Real-World Impact

The sensitive customer information, financial records, and intellectual property are stored in applications. Data breaches usually generate huge data leaks, penalties, and negative publicity.

An example Case: The 2017 Equifax breach was caused by an unpatched Apache Struts application vulnerability. The company has paid over 147 million records, which valued the company at over 1.4 billion in settlements and security upgrades.

How Application Penetration Testing Prevents Real-World Breaches?

Application penetration testing prevents breaches by addressing vulnerabilities before attackers exploit them. Here’s how:

Identifies Risks Before Attackers Do

Pentesters are known to actively test vulnerabilities in a manner not possible by automated applications. This guarantees companies identify defects at an early stage, when their enemies cannot take advantage of the defects.

Simulates Real Attack Scenarios

Using imitation of the tricks of threat actors, pentests demonstrate how a minor vulnerability can develop into a large-scale hack.

Prioritizes Remediation

Testing reveals which vulnerabilities are truly exploitable and which are noise. Security teams can then focus on fixing the risks with the greatest business impact.

Supports Compliance Requirements

Frameworks like PCI DSS, HIPAA, and SOC 2 often mandate regular penetration testing. Beyond compliance, the reports also provide executives and auditors with evidence of proactive security.

Enables Continuous Security Validation

Under modern Pentesting as a Service (PTaaS), penetration testing ceases to be an annual undertaking. The ongoing validation keeps the applications resistant to new threats that are presented by code modification and infrastructure modifications.

Common Vulnerabilities Uncovered in Penetration Tests

Pentesters frequently uncover vulnerabilities that attackers actively exploit in the wild. Some of the most common include:

• Injection Flaws – SQL injection, command injection, and LDAP injection.
  
• Authentication Issues – weak credentials, missing MFA, poor session management.
  
• Cross-Site Scripting (XSS) – client-side code injection that can hijack user sessions.
  
• Insecure Direct Object References (IDOR) – exposing sensitive resources by manipulating parameters.
  
• API Misconfigurations – overly permissive endpoints, missing rate limits, or lack of authentication.
  
• Third-Party Component Risks – vulnerable open-source libraries or dependencies.
  

These vulnerabilities often serve as the initial foothold for large-scale breaches.

Case Studies and Breach Examples

1. Equifax (2017)

• The breach involved an unpatched Apache Struts vulnerability (CVE-2017-5638), which attackers exploited.
  
• The number of U.S. consumers affected was about 147.9 million Americans.
  
• The total costs (legal, regulatory, remediation, technology upgrade, etc.) are estimated at around US$1.38 to US$1.4 billion.
  
• Settlement specifics: the global settlement included payments and remediation work. For example, FTC/CFPB/state-level settlements. 

Source: Cyber Defence

2. API Misconfiguration at Facebook (2019)

• Root Cause: Poor API security exposed phone numbers of 419 million users.
  
• Impact: Privacy violations, reputational loss, and regulatory scrutiny.
  
• How Pentesting Could Help: API pentests simulate misuse cases and would have identified weak or missing access controls.

Source: TechCrunch

3. British Airways (2018)

• In summer 2018, British Airways suffered a data breach affecting customer payment card data. Around 380,000 payment cards were compromised.
  
• The UK Information Commissioner’s Office (ICO) fined British Airways £20 million in October 2020 for failures under GDPR (failure to protect data, integrity & confidentiality, etc.).
  
• Initial proposals had been much higher (around £183 million) before reductions.

Source: The Guardian

These examples show that breaches are rarely the result of unknown “zero-days.” More often, they stem from well-known vulnerabilities that regular penetration testing could identify.

The reason why Traditional Vulnerability Scanning is insufficient.

Although the traditional vulnerability scanners are suitable for detecting potential vulnerabilities in an application, it is likely to fail when it comes to measuring the actual exploitability. These scanners usually give out a list of vulnerabilities, but without the contextual knowledge on which vulnerabilities can be practically used by a determined attacker.

The limitations of Automated Scanners

• The automated scanners concentrate mostly on the vulnerabilities that have been identified, and although the scanners are efficient in identifying the vulnerabilities of the systems, they are unable to counter the advanced attack patterns or dynamic chains of exploitation.
• Scanners also do not provide the business context, i.e., they may raise red flags to vulnerabilities that are not particularly significant to the risk profile of the organization. An example is when a high-severity vulnerability would be considered low priority because it is in a low-risk setting or an internal network that is not connected to the internet.
• Moreover, automated tools tend to leave business logic weaknesses, such as situations in which a user can abuse functionality in a manner not originally intended. Such defects are difficult to identify using a scanner, but can be identified using manual penetration testing.

Current PTaaS Continuous Checking and Company Benefits.

Classical penetration testing can be regarded as a snapshot test. You pay a team, they are testing your applications, where you are then given a report, and in months later, you do the same. This practice has holes between the tests, and this is where new vulnerabilities can be added without notice. Modern Pentesting as a Service (PTaaS) alters this and provides speed, collaboration, and constant verification to reduce pentesting to a continuous component of your security program.

• Delivery in Less than 48 hours – no long queues for beginning to test.
• Live teamwork – the teams communicate in real-time with testers, explaining the discoveries in real-time.
• Single dashboards – see vulnerabilities, remediation, and status in a single location.
• Free retests and directed remediation – confirm repairs at no extra charge.
• CTEM & DevSecOps integration – incorporate pentesting into CI/CD pipelines to achieve continuous validation.

Concisely, pentesting using Strobes is not merely a test, but a living and breathing component of your security ecosystem that assists businesses to stay ahead of attackers as well as to remain efficient, compliant, and certain of their application security posture.

Key Takeaways for Security Teams

• Automated scanners alone cannot prevent breaches. Human-driven pentesting validates real risks.
  
• Most breaches stem from common, known vulnerabilities that penetration testing can identify.
  
• Application pentesting is critical not only for security but also for compliance, customer trust, and operational resilience.
  
• Continuous pentesting models like PTaaS integrate seamlessly into DevSecOps and CTEM programs.
  

Conclusion

Applications are the front line of the present-day business, and attackers understand this. The cost of a breach in terms of financial, reputational, and compliance is many times greater than the cost of proactive security testing.

Application penetration testing is not optional rather necessary. This is to make sure that the vulnerable points are detected, confirmed, and sealed before they translate into actual attacks.

Strobes PTaaS means that your team can have a faster kickoff in under 48 hours, collaborate live with expert testers, have unified dashboards to see clear progress, be able to do optional retests with guided remediation, and be successfully integrated with CTEM and DevSecOps pipelines.

This implies that vulnerabilities are identified, confirmed as well and resolved before they can be utilized and ensuring that your organization is under constant protection and relief. Prevent breaches prior to occurring- unlock Strobes PTaaS and schedule your application penetration assessment today. 

Prevent breaches before they happen, unlock the full potential of Strobes PTaaS and book a free demo today!

The post How Application Penetration Testing Prevents Real-World Breaches appeared first on Strobes Security.

*** This is a Security Bloggers Network syndicated blog from Strobes Security authored by Likhil Chekuri. Read the original post at: https://strobes.co/blog/application-penetration-testing-prevent-breaches/