The answer is an unrestricted file upload vulnerability. This is correct because the web application failed to validate the uploaded file’s type and content, allowing an attacker to upload a PHP file that the server then executed as code, leading directly to remote code execution. On the Certified Ethical Hacker CEH exam, this scenario tests your understanding of input validation failures and server-side execution controls, often appearing in questions about web application attacks where a simple profile picture upload turns into a full compromise. A common trap is confusing this with command injection or path traversal, but the core flaw here is the lack of file type restrictions and execution prevention. Memory tip: think “upload and execute” — if the server runs what you upload, it’s an unrestricted file upload vulnerability.
CEH Web Application and Injection Attacks Practice Question
This CEH practice question tests your understanding of web application and injection attacks. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 web application allows users to upload profile pictures. An attacker uploads a file named "profile.php" containing malicious PHP code. When the attacker visits the uploaded file's URL, the code executes. Which vulnerability is being exploited?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
File upload vulnerability
The application fails to validate the file type or restrict execution, allowing a malicious PHP file to be uploaded and executed on the server, which is a classic file upload vulnerability leading to remote code execution.
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.
✗
Directory traversal
Why it's wrong here
Directory traversal allows reading files outside the web root, not uploading.
✗
Command injection
Why it's wrong here
Command injection involves injecting OS commands, not uploading executable files.
✓
File upload vulnerability
Why this is correct
The attacker uploaded a malicious PHP file that executes, indicating a file upload vulnerability.
Related concept
Read the scenario before looking for a memorised answer.
✗
Stored XSS
Why it's wrong here
Stored XSS involves injecting client-side scripts, not server-side code execution.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
Command injection involves injecting OS commands, not uploading executable files.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 practitioner preparing for the CEH exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CEH question in full detail.
Identify which CEH exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Web Application and Injection Attacks — This question tests Web Application and Injection Attacks — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: File upload vulnerability — The application fails to validate the file type or restrict execution, allowing a malicious PHP file to be uploaded and executed on the server, which is a classic file upload vulnerability leading to remote code execution.
What should I do if I get this CEH question wrong?
Identify which CEH exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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 →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A web application allows users to upload profile images. An attacker uploads a file named 'image.php.png' with malicious PHP code, and the server executes it as PHP. Which type of vulnerability is this?
medium
A.Directory traversal
B.Command injection
C.SQL injection
✓ D.Unrestricted file upload
Why D: Unrestricted file upload vulnerabilities allow attackers to upload executable files if the server does not validate the file type or execute permissions.
Variation 2. A web server is configured with WebDAV and allows PUT requests. An attacker uploads a .asp file and accesses it to execute code. Which tool or method is most directly associated with exploiting this misconfiguration?
hard
A.SQL injection
✓ B.File upload vulnerability
C.Directory brute forcing
D.Cross-site scripting (XSS)
Why B: WebDAV with PUT enabled allows attackers to upload arbitrary files, including web shells, leading to remote code execution.
Last reviewed: Jun 21, 2026
Question Discussion
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This CEH practice question is part of Courseiva's free EC-Council 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 CEH exam.
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