- A
The scanner used a POST request instead of a GET request for the payload
Why wrong: The request method does not affect whether output is encoded; it is unlikely to cause a false positive.
- B
The scanner's payload was reflected in a different context not subject to HTML encoding
Why wrong: If the payload is reflected in a context that is not encoded, it could be a real vulnerability, but here manual testing shows encoding is applied in all contexts.
- C
The scanner used a payload with special characters that were truncated by the server
Why wrong: Truncation would likely prevent the payload from appearing in the response, not cause a false positive.
- D
The scanner's payload triggered a server error that echoed back the input without encoding
Error messages may reflect input without encoding, leading the scanner to flag a false XSS finding.
Quick Answer
The correct answer is that the scanner’s payload triggered a server error that echoed back the input without encoding. This happens because the vulnerability scanner’s request inadvertently causes the web server to return an error page—such as a 500 or 404—that reflects the unencoded payload directly, bypassing the application’s normal HTML-encoding logic. On the CompTIA PenTest+ PT0-002 exam, this scenario tests your ability to distinguish between a true reflected XSS and a false positive caused by server-side error handling; the common trap is assuming any reflected input is exploitable, when in fact the reflection only occurs during an error state, not in the application’s standard output flow. Remember the key distinction: if the reflection only appears in an error response, it is not a valid attack vector. A useful memory tip is “Error echo, no exploit go”—if the payload bounces back only from a server error, the XSS is a false positive.
PT0-002 Practice Question: Information Gathering and Vulnerability Scanning
This PT0-002 practice question tests your understanding of information gathering and vulnerability scanning. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 a reflected XSS vulnerability in a web application. Manual testing confirms that the application HTML-encodes all user input in the response. Which scanner misconfiguration is MOST likely causing this false positive?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The scanner's payload triggered a server error that echoed back the input without encoding
Option D is correct because a server error that echoes back the unencoded input bypasses the application's normal HTML-encoding logic. In this scenario, the vulnerability scanner detects the reflected payload in the error response, which is not subject to the same encoding as the application's standard output. This creates a false positive because the reflected XSS is not exploitable through the normal application flow, but only through an error condition that the scanner inadvertently triggered.
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.
- ✗
The scanner used a POST request instead of a GET request for the payload
Why it's wrong here
The request method does not affect whether output is encoded; it is unlikely to cause a false positive.
- ✗
The scanner's payload was reflected in a different context not subject to HTML encoding
Why it's wrong here
If the payload is reflected in a context that is not encoded, it could be a real vulnerability, but here manual testing shows encoding is applied in all contexts.
- ✗
The scanner used a payload with special characters that were truncated by the server
Why it's wrong here
Truncation would likely prevent the payload from appearing in the response, not cause a false positive.
- ✓
The scanner's payload triggered a server error that echoed back the input without encoding
Why this is correct
Error messages may reflect input without encoding, leading the scanner to flag a false XSS finding.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the distinction between a vulnerability being present in an error response versus the normal application flow, tricking candidates into thinking any reflection of input confirms XSS without considering the response context.
Trap categories for this question
Command / output trap
The request method does not affect whether output is encoded; it is unlikely to cause a false positive.
Detailed technical explanation
How to think about this question
Reflected XSS false positives often arise when scanners send malformed requests that trigger HTTP 500 errors or custom error pages that echo back the input without sanitization. The scanner's payload detection logic matches the reflected string in the error response, but the vulnerability is not exploitable via normal application pages. In real-world scenarios, penetration testers must verify that the reflection occurs in a valid HTTP response with a 2xx status code and within the intended application context, not in error messages or debug output.
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Information Gathering and Vulnerability Scanning — study guide chapter
Learn the concepts, then practise the questions
- →
Information Gathering and Vulnerability Scanning practice questions
Targeted practice on this topic area only
- →
All PT0-002 questions
509 questions across all exam domains
- →
CompTIA PenTest+ PT0-002 study guide
Full concept coverage aligned to exam objectives
- →
PT0-002 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related PT0-002 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Planning and Scoping practice questions
Practise PT0-002 questions linked to Planning and Scoping.
Information Gathering and Vulnerability Scanning practice questions
Practise PT0-002 questions linked to Information Gathering and Vulnerability Scanning.
Attacks and Exploits practice questions
Practise PT0-002 questions linked to Attacks and Exploits.
Reporting and Communication practice questions
Practise PT0-002 questions linked to Reporting and Communication.
Tools and Code Analysis practice questions
Practise PT0-002 questions linked to Tools and Code Analysis.
PT0-002 fundamentals practice questions
Practise PT0-002 questions linked to PT0-002 fundamentals.
PT0-002 scenario practice questions
Practise PT0-002 questions linked to PT0-002 scenario.
PT0-002 troubleshooting practice questions
Practise PT0-002 questions linked to PT0-002 troubleshooting.
Practice this exam
Start a free PT0-002 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this PT0-002 question test?
Information Gathering and Vulnerability Scanning — This question tests Information Gathering and Vulnerability Scanning — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The scanner's payload triggered a server error that echoed back the input without encoding — Option D is correct because a server error that echoes back the unencoded input bypasses the application's normal HTML-encoding logic. In this scenario, the vulnerability scanner detects the reflected payload in the error response, which is not subject to the same encoding as the application's standard output. This creates a false positive because the reflected XSS is not exploitable through the normal application flow, but only through an error condition that the scanner inadvertently triggered.
What should I do if I get this PT0-002 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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 30, 2026
This PT0-002 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PT0-002 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.