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CORS misconfiguration testing v1.0.0

Use this resource to hunt CORS misconfigurations within an authorized scope

New

  • 373 downloads
  • 101 likes
  • 215 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install cors-misconfiguration-testing

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent finds endpoints that send CORS headers, tests whether they reflect an arbitrary origin or accept null, then ranks the risk by the data exposed. It applies the authorization gate before active probes. You get the weak endpoints and their evidence.

Mostly picked by

Updated November 2, 2026

Card for the “CORS misconfiguration testing” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • SKILL.md: CORS endpoint discovery and phased method
  • SKILL.md: origin reflection and null origin tests, with finding examples

Good fit for

  • Your API is called from several front-end domains
  • An API returns account data with permissive CORS headers

Not for

    Tags

    • cors
    • api
    • browser
    • security
    • audit

    About

    You say

    “Check whether our test application's API reflects an arbitrary origin, within the authorized scope.”

    Card for the “CORS misconfiguration testing” skill

    Skill published by sickn33 under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to hunt CORS misconfigurations within an authorized scope
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • SKILL.md18.4 KB

    Origin and licence

    Listed unmodified

    Author
    sickn33
    Source
    github.com/sickn33/agentic-awesome-skills/tree/e9809578fd426a284af017c5db99f8eb6628e6ca/skills/hunt-cors
    Licence
    MIT

    Notice

    « hunt-cors » (sickn33, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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