Individual skill
performing-reflected-file-download
Identifying and exploiting Reflected File Download (RFD) where an endpoint reflects attacker-controlled input into a downloadable response with an attacker-controlled filename and extension, enabling command execution on the victim's machine when the file is run.
internal/tools/skills/data/web-application-security/performing-reflected-file-download/SKILL.md
Source commit d42f381ad34843e71a42658e5c57290c713e85af
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- No
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Not checked yet
- Last checked
- Nov 7, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
Install this skill
Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.
An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.
Repository context
- Repository stars (not skill ratings)
- 1,310
- Repository last updated
- Nov 7, 2026
- License
- Apache-2.0
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- cybersecurity Repository topic
- security Repository topic
- bug-bounty Repository topic
- automation Repository topic
- autonomous-pentesting Repository topic
- ai-agent Repository topic
- ai-security Repository topic
- ethical-hacking Repository topic
- golang Repository topic
- penetration-testing Repository topic
- penetration-testing Declared skill tag
- rfd Declared skill tag
- reflected-file-download Declared skill tag
- json Declared skill tag
- jsonp Declared skill tag
- content-disposition Declared skill tag
- web-security Declared skill tag
- writing Derived category
- security Derived category
- testing Derived category
Files and excerpt
File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.
Browse files
Read excerpt
# Performing Reflected File Download
## When to Use
- During authorized penetration tests of applications that reflect user input into responses (especially JSON/JSONP APIs)
- When an endpoint accepts a value (callback, query param, search term, username) and echoes it into the response body
- When the URL path or a parameter can control the *filename* and *extension* the browser uses when saving the response
- For validating that downloads are forced to safe filenames/extensions and proper `Content-Disposition` handling
- During bug bounty programs targeting RFD, which chains reflection + content-disposition + permissive routing into client-side command execution
## Prerequisites
- **Authorization**: Written penetration testing agreement covering social-engineering/client-side payloads
- **A modern browser matrix**: RFD behavior depends on browser download handling (test Chrome, Edge, and IE-derived behaviors)