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Best Vulnerability Assessment Scanner Online

Posted DateMay 7, 2018
Posted Time 6   min Read


Last Modified : Nov 7, 2023 @ 12:32

Hackers are getting smarter; are you?

According to the Open Web Application Security Project (OWASP), a vulnerability is a hole or a weakness in the application, which can be a design flaw or an implementation bug, that allows an attacker to cause harm to the stakeholders of an application.”

While most companies understand what is vulnerability is, there seem to be misunderstandings on what to look for and how to prioritize security.

  • 80 – 90% of applications are built from 3rd party components that often contain critical vulnerabilities [ State of Software Supply Chain Report]
  • 57% of respondents have no clue whether their applications were ever breached [Ponemon Report]
  • Unpatched vulnerabilities were the source of 60 % of data breaches [Ponemon Survey]
  • Only 4% of the vulnerabilities are low in severity and business impact [Security Trends & Vulnerabilities Review]
  • 18,325 new vulnerabilities and exposures were identified in 2020 [Statista]

The numbers are conclusive. If your business is online, hackers will find these vulnerabilities. Both customers and stockholders do not like hearing about security elapses. Security breaches besides just causing damages and hurting revenues due to down-time also has an intangible and larger impact of hurting reputation of the business and reducing customer trust on the business.  These are larger consequences business has to face due to a breach.

Security analysts recommend finding vulnerabilities before the hackers and suggest that you repair issues to avoid exploitations. Here are the guidelines to help you pick the best vulnerability scanner online.

What Why
1. Recognize Vulnerabilities To identify type and impact
2. Follow Scan Methodology To ensure thorough vulnerability tests
3. Categorize by Severity To set website priorities
4. Zero-Day Detection Cover all threats
5. Online Pen Test For business logic flaws
6. Effective Reporting To convey issues efficiently
7. Remediation Guidance To fix issues


1 Recognize Vulnerabilities

There are several types of vulnerability detection tools online. Some scans for the top three issues, while others follow a specific list like the OWASP Top 10 or SANS Top 25.

You should look for a online vulnerability scanner that can identify most of the security loopholes that hackers target. This includes the likes of SQL Injection, Cross-Site Scripting, Cross-Site Request Forgery, and other OWASP 10 and SANS 25 weaknesses.

Security Loopholes


  • Injection
  • Broken Authentication and Session Management
  • Sensitive Data Exposure
  • XML External Entity
  • Broken Access Control
  • Security Misconfiguration
  • Cross-Site Scripting
  • Insecure deserialization
  • Using Components with Known Vulnerabilities
  • Insufficient Logging and Monitoring


Insecure Interaction Between Components

CWE-89 Improper Neutralization of Special Elements used in an SQL Command (‘SQL Injection’)
CWE-78 Improper Neutralization of Special Elements used in an OS Command (‘OS Command Injection’)
CWE-79 Improper Neutralization of Input During Web Page Generation (‘Cross-site Scripting’)
CWE-434 Unrestricted Upload of File with Dangerous Type
CWE-352 Cross-Site Request Forgery (CSRF)
CWE-601 URL Redirection to Untrusted Site (‘Open Redirect’)

Risky Resource Management

CWE-120 Buffer Copy without Checking Size of Input (‘Classic Buffer Overflow’)
CWE-22 Improper Limitation of a Pathname to a Restricted Directory (‘Path Traversal’)
CWE-494 The download of Code Without Integrity Check
CWE-829 Inclusion of Functionality from Untrusted Control Sphere
CWE-676 Use of Potentially Dangerous Function
CWE-131 Incorrect Calculation of Buffer Size
CWE-134 Uncontrolled Format String
CWE-190 Integer Overflow or Wraparound

Porous Defenses

CWE-306 Missing Authentication for Critical Function
CWE-862 Missing Authorization
CWE-798 Use of Hard-coded Credentials
CWE-311 Missing Encryption of Sensitive Data
CWE-807 Reliance on Untrusted Inputs in a Security Decision
CWE-250 Execution with Unnecessary Privileges
CWE-863 Incorrect Authorization
CWE-732 Incorrect Permission Assignment for Critical Resource
CWE-327 Use of a Broken or Risky Cryptographic Algorithm
CWE-307 Improper Restriction of Excessive Authentication Attempts
CWE-759 Use of a One-Way Hash without a Salt

Resource: Cheatsheets OWASP and SANS

2 Follow Testing Methodology

Whether it is automated, online vulnerability scanning, or manual penetration testing, it is crucial that the vendor follows the standards laid down by leading web application security bodies. It is a complex 12-step process that includes application logic mapping, configuration, and proper documentation before publishing results.

The following diagram will serve as the context based on which you can educate a business to take more proactive steps for security

Pen Testing Methodology

3 Categorize by Vulnerability Severity

The most important application security metric that everyone should have. Independent of using automated vulnerability scanning tools, penetration testing/ethical hacking, or a hybrid combination of both being used the report should highlight the risk in detail.

A more comprehensive view of these vulnerabilities will also emphasize the risk severity and business risks of each vulnerability.

Application Security Metrics 1

It will help your business to prioritize what’s more critical and what should be fixed first.

Security Metrics Severity

Your online vulnerability scanner should be able to discover vulnerabilities based on the business impact.

4 Zero-Day Detection

A zero-day vulnerability is a disclosed weakness in a software that is unknown to the party or parties responsible for patching or otherwise fixing the flaw.

Most vulnerability scanning tools are not efficient to look for new vulnerabilities. They often will run on code and logic wrote years ago. Hence it is imperative to find a security assessment vendor who in their offering not only reports zero-day issues but also quickly updates their signatures and policies to find them in their assessment (Both automated and manual) and back it up with 24×7 support team to help answer queries around these new threat vectors.

Zero Day Detection

5 Pen Testing

Any serious web application would need a combination of regular automated test and periodic manual assessment for enhancing their security posture. While automated vulnerability scanning tools are quick in uncovering common issues, you will also need periodic penetration testing to ensure that business logic issues are also detected.

Often applications have security gaps that are exclusive to their business. The following are some notable examples.

 -An e-commerce site allows users to add items to cart, view a summary page and then pay. What if they could go back to the summary page, maintaining their same valid session and inject a lower cost for an item and complete the payment transaction?
-Can a user hold an item infinitely in the shopping cart and keep others from purchasing it?
-Can a user lock an item in a shopping cart at a discounted price and purchase it after several months?
-What if a user books an item through a loyalty account and gets loyalty points but cancels before the transaction could be completed?

Ensure that your online vulnerability scanner provider uses a pen testing team that can help you out when needed.

6 Effective Reporting

Simply publishing the vulnerabilities found during scanning is not the best way to conduct reporting. Often business managers and developers look for insightful reports that lay down the essential points and help them to understand what’s wrong and what the risk is.

Pentest Process

An ideal web scanning report should include the following points:

  • Number of vulnerabilities
  • Types of vulnerabilities
  • Criticality of vulnerabilities
  • Business impact
  • Observations from the tester
  • Analysis

7 Remediation Guidance

Efficient scanning companies do more than state the problem; they offer detailed suggestions on how vulnerabilities can be mitigated. For instance, AppTrana has an end-to-end remediation workflow function integrated with all its scans. Security analysts thus send their mitigation guidelines to developers.

Instant Protection with Indusface

It’s vital to look at other mitigation options such as a Web Application Firewall to virtually patch vulnerabilities to evade hackers from exploiting them.


The tightly-integrated WAF and vulnerability scanner modules ensure that there is constant learning which is shared across both, improving the efficacy of detection & protection for all types of attacks. Look for application scanning vendors that offer integrated plans such as Scanning + WAF as your security needs grow.

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