novaestellar/novahaku · testing/hunt/hunt-mfa-bypass/SKILL.md

hunt-mfa-bypass skillA

hunt-mfa-bypass is agent-read markdown (skill) from novaestellar/novahaku: Hunt MFA / 2FA bypass — 7 distinct patterns. (1) MFA not enforced on sensitive endpoints (password change, email change accept without MFA challenge), (2) MFA-step skip via direct navigation to post-login URL, (3) MFA-token replay (same code accepted twice), (4) brute-force the 6-digit OTP without rate limit (10^6 attempts at server speed), (5) race condition on OTP validation, (6) recovery-code dump via /api/me, (7) backup factor downgrade (SMS factor with no rate limit). Plus the chain: cookie.

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add novaestellar/novahaku/hunt-mfa-bypass@git:20260910.546fe86
Exact content
mdr add novaestellar/novahaku/hunt-mfa-bypass@sha256:d90fb6bc88a8126e

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_637u6zvsexdxkrgq.svg)](https://markdownregistry.com/a/art_637u6zvsexdxkrgq)

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Versions

versioncommittedcommitsizeaudit
git:20260910.546fe86 latest2026-09-10 546fe86 8,739 BA view · diff
git:20260903.29924dd2026-09-03 29924dd 8,751 BA view · diff
git:20260903.fa855c42026-09-03 fa855c4 8,722 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (8739 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

novaestellar/novahaku · 24 stars · license none · pushed 2026-09-10 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_637u6zvsexdxkrgq
GET https://markdownregistry.com/api/v1/resolve?ref=novaestellar/novahaku/hunt-mfa-bypass
GET https://markdownregistry.com/api/v1/blob/d90fb6bc88a8126e34efa360d4728df12bf3ce7a716c07382747850a350a3f22

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.