CS0-003 Vulnerability Management Practice Question
This CS0-003 practice question tests your understanding of vulnerability management. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A vulnerability scanner reports that an internal web application is vulnerable to SQL injection. The development team says they fixed it by input sanitization. Which of the following should the analyst do FIRST?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Rescan the application to confirm remediation
Option C is correct because the first step after a claimed fix is to verify the remediation by rescanning the application with the same vulnerability scanner. This provides objective evidence that the SQL injection vector is no longer exploitable, confirming the input sanitization was effective before any further actions are taken.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Update the vulnerability report
Why it's wrong here
Reporting should occur after verification.
✗
Perform a manual penetration test
Why it's wrong here
Manual testing is time-consuming and should be done after automated scanning.
✓
Rescan the application to confirm remediation
Why this is correct
Rescanning provides immediate evidence of whether the vulnerability is resolved.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Review the code changes
Why it's wrong here
Code review is important but slower; rescanning is more efficient first step.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the misconception that reviewing code changes is the immediate next step, but the correct first action is always to verify the fix with the same scanning tool to maintain an objective audit trail.
Detailed technical explanation
How to think about this question
Vulnerability scanners like Nessus or Qualys use signature-based detection to identify SQL injection points, and rescanning after a fix ensures the specific payloads that previously triggered the alert no longer succeed. Input sanitization, if improperly implemented (e.g., only escaping single quotes but not handling second-order injection), can still leave the application vulnerable, which a rescan may catch if the scanner tests multiple injection patterns. In real-world scenarios, a rescan might reveal that the fix only addressed one parameter while other input fields remain exposed.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A security team runs a vulnerability scan on a web application and discovers an unpatched SQL injection flaw. The team prioritises remediation by CVSS score — critical flaws are patched within 24 hours, high within 7 days. Questions like this test whether you understand vulnerability management processes, scanning tools, and remediation prioritisation.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CS0-003 question in full detail.
Vulnerability Management — This question tests Vulnerability Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Rescan the application to confirm remediation — Option C is correct because the first step after a claimed fix is to verify the remediation by rescanning the application with the same vulnerability scanner. This provides objective evidence that the SQL injection vector is no longer exploitable, confirming the input sanitization was effective before any further actions are taken.
What should I do if I get this CS0-003 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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