Quick Answer
The answer is remote code execution via uploaded shell. This is correct because directory listing exposes the exact file path to the previously uploaded shell.php, allowing the attacker to directly access it in a browser and trigger its execution on the server. Once the shell runs, it provides a command interface—typically a web shell—enabling the attacker to execute arbitrary system commands, effectively achieving remote code execution. On the Certified Ethical Hacker CEH exam, this scenario tests your understanding of the full attack chain: directory listing is not the vulnerability itself but the enabler that turns an uploaded file into a live exploit. A common trap is focusing on the directory listing as the primary risk, when the real exam point is that listing reveals the shell’s location, making RCE the immediate next step. Memory tip: “List it, link it, launch it”—directory listing reveals the path, the attacker links to the shell, and launches commands for RCE.
This CEH practice question tests your understanding of web application and injection attacks. 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 web server is found to have directory listing enabled for the /uploads folder. An attacker discovers a shell.php file uploaded earlier. Which attack is the attacker MOST likely to perform next?
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.
File inclusion
Why wrong: File inclusion involves including files, but the attacker already has a shell uploaded.
Cross-site scripting
Why wrong: XSS would target users, not server-side command execution.
Remote code execution via uploaded shell
The attacker can locate the shell via directory listing and then access it to execute commands.
SQL injection
Why wrong: SQL injection targets databases, not file uploads.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Remote code execution via uploaded shell
With directory listing, the attacker can find the path to the uploaded shell and then access it to execute commands on the server.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
File inclusion
Why it's wrong here
File inclusion involves including files, but the attacker already has a shell uploaded.
Cross-site scripting
Why it's wrong here
XSS would target users, not server-side command execution.
Remote code execution via uploaded shell
Why this is correct
The attacker can locate the shell via directory listing and then access it to execute commands.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
SQL injection
Why it's wrong here
SQL injection targets databases, not file uploads.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Trap categories for this question
Command / output trap
XSS would target users, not server-side command execution.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CEH NAT questions on configuration and troubleshooting.
Web Application and Injection Attacks — study guide chapter
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FAQ
Web Application and Injection Attacks — This question tests Web Application and Injection Attacks — Static NAT maps one inside address to one outside address..
The correct answer is: Remote code execution via uploaded shell — With directory listing, the attacker can find the path to the uploaded shell and then access it to execute commands on the server.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CEH NAT questions on configuration and troubleshooting.
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 21, 2026
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