This CS0-003 practice question tests your understanding of security operations. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: hTTP 200 status code does not guarantee a benign request or lack of exploit.. 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 WAF generates repeated SQL injection alerts against a login endpoint. The application team says the requests returned HTTP 200. What should the analyst do before declaring compromise? In the root-cause analysis phase, Which finding would most directly explain the activity?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Review application logs for query errors, authentication events, and abnormal database access
Option A is correct because the WAF alerts indicate potential SQL injection attempts, but HTTP 200 responses do not rule out successful exploitation. The analyst must review application logs for actual query errors, authentication anomalies, or unauthorized database access to confirm whether the injection succeeded. Without log correlation, the analyst cannot determine if the WAF blocked the attack or if the payload bypassed it and executed on the backend.
Key principle: HTTP 200 status code does not guarantee a benign request or lack of exploit.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Review application logs for query errors, authentication events, and abnormal database access
Why this is correct
HTTP 200 can occur for blocked, handled, or successful requests; application and database context determine impact.
Related concept
HTTP 200 status code does not guarantee a benign request or lack of exploit.
✗
Disable the WAF rule because it may be noisy
Why it's wrong here
Tuning may be needed later, but disabling protection before validation is risky.
✗
Ask users to change passwords without checking logs
Why it's wrong here
Password resets may be required, but the first step is impact validation.
✗
Treat every HTTP 200 as proof of exploitation
Why it's wrong here
Status codes alone do not prove database compromise.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that HTTP 200 means no compromise occurred, when in fact SQL injection can succeed while returning a normal status code, especially with blind injection or when the application catches errors gracefully.
Detailed technical explanation
How to think about this question
SQL injection payloads can return HTTP 200 even when the injection fails (e.g., due to syntax errors caught by the database) or when the application returns a generic success page. The analyst should check for database error messages in application logs (e.g., MySQL error 1064), unusual query patterns in database audit logs, or authentication bypass indicators such as successful logins without valid credentials. In real-world scenarios, attackers often use blind SQL injection techniques (e.g., time-based or boolean-based) that return HTTP 200 but exfiltrate data through response timing or content differences.
KKey Concepts to Remember
HTTP 200 status code does not guarantee a benign request or lack of exploit.
WAF alerts require validation through deeper application and database log analysis.
SQL injection can succeed without generating application-level errors.
Correlation of logs from multiple sources (WAF, app, DB) is crucial for incident validation.
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
HTTP 200 status code does not guarantee a benign request or lack of exploit.
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.
Review hTTP 200 status code does not guarantee a benign request or lack of exploit., then practise related CS0-003 questions on the same topic to reinforce the concept.
Security Operations — This question tests Security Operations — HTTP 200 status code does not guarantee a benign request or lack of exploit..
What is the correct answer to this question?
The correct answer is: Review application logs for query errors, authentication events, and abnormal database access — Option A is correct because the WAF alerts indicate potential SQL injection attempts, but HTTP 200 responses do not rule out successful exploitation. The analyst must review application logs for actual query errors, authentication anomalies, or unauthorized database access to confirm whether the injection succeeded. Without log correlation, the analyst cannot determine if the WAF blocked the attack or if the payload bypassed it and executed on the backend.
What should I do if I get this CS0-003 question wrong?
Review hTTP 200 status code does not guarantee a benign request or lack of exploit., then practise related CS0-003 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
HTTP 200 status code does not guarantee a benign request or lack of exploit.
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