Web vulnerability scanning in Cybersecurity - Step-by-Step Execution

Concept Flow - Web vulnerability scanning

Start Scan

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Identify Target Web Application

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Send Requests to Web Server

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Analyze Responses for Weaknesses

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Detect Vulnerabilities

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Generate Report

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End Scan

The scanner starts by targeting a web app, sends requests, analyzes responses for weaknesses, detects vulnerabilities, and then reports findings.

Execution Sample

Cybersecurity

1. Start scan on example.com
2. Send HTTP requests
3. Check responses for errors or leaks
4. Identify vulnerabilities
5. Create report

This sequence shows how a web vulnerability scanner tests a website step-by-step to find security issues.

Analysis Table

Step	Action	Request Sent	Response Analyzed	Vulnerability Found	Output
1	Start scan	No	No	No	Scan started for example.com
2	Send HTTP GET request	GET /index.html	Yes	No	Received 200 OK
3	Send HTTP POST request with test input	POST /login	Yes	Yes	SQL Injection vulnerability detected
4	Send request to admin page	GET /admin	Yes	No	Access denied as expected
5	Send request with XSS payload	GET /search?q=<script>	Yes	Yes	Cross-site scripting vulnerability found
6	Generate report	No	No	Summary of vulnerabilities	Report created with 2 vulnerabilities
7	End scan	No	No	No	Scan completed

💡 Scan ends after all test requests are sent and vulnerabilities are reported.

State Tracker

Variable	Start	After Step 2	After Step 3	After Step 5	Final
Vulnerabilities Found	0	0	1 (SQL Injection)	2 (SQL Injection, XSS)	2
Scan Status	Not started	Running	Running	Running	Completed
Report Content	Empty	Empty	Includes SQL Injection	Includes SQL Injection and XSS	Finalized

Key Insights - 3 Insights

Why does the scanner send different types of requests like GET and POST?

Because vulnerabilities can appear in different request types; the scanner tests multiple methods to find more issues, as shown in steps 2 and 3 of the execution_table.

What does it mean when a vulnerability is 'found' during response analysis?

It means the scanner detected signs of a security weakness in the server's response, like unexpected errors or code execution, as seen in steps 3 and 5.

Why is generating a report important after scanning?

The report summarizes all found vulnerabilities so developers can fix them; this is the final output in step 6.

Visual Quiz - 3 Questions

Look at the execution_table, at which step is the first vulnerability detected?

A Step 2

B Step 3

C Step 4

D Step 5

💡 Hint

Check the 'Vulnerability Found' column in the execution_table rows.

According to variable_tracker, how many vulnerabilities are found after step 5?

A 2

B 1

C 3

D 0

💡 Hint

Look at the 'Vulnerabilities Found' row after 'After Step 5' column.

If the scanner did not send POST requests, which vulnerability might be missed according to the execution_table?

A Cross-site scripting (XSS)

B Access denied error

C SQL Injection

D No vulnerabilities would be missed

💡 Hint

Step 3 shows SQL Injection found after a POST request.

Concept Snapshot

Web vulnerability scanning:
- Sends various requests to a web app
- Analyzes responses for security weaknesses
- Detects issues like SQL Injection and XSS
- Produces a report for fixing vulnerabilities
- Helps keep websites safe

Full Transcript

Web vulnerability scanning is a process where a tool tests a website by sending different types of requests like GET and POST. It looks at the responses to find security problems such as SQL Injection or Cross-site scripting. The scanner records any vulnerabilities it finds and creates a report summarizing them. This helps developers fix the issues and protect the website from attacks. The scanning ends after all tests are done and the report is generated.