hunt-mfa-bypass SKILL.md skillA
hunt-mfa-bypass from adriannoes/awesome-agentic-ai is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add adriannoes/awesome-agentic-ai/hunt-mfa-bypass@git:20260611.ff4cc7cPins git:20260611.ff4cc7c in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- adriannoes/awesome-agentic-ai
- Path
cursor-claude-codex/skills/bug-hunter/skills/hunt-mfa-bypass/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260611.ff4cc7c, committed Jun 11, 2026
- Size
- 5,762 bytes
- Repository stars
- 69
- License
- MIT
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…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
## 19. MFA / 2FA BYPASS
> Growing bug class — 7 distinct patterns. Pays High/Critical when it enables ATO without prior session.
### Pattern 1: No Rate Limit on OTP
```bash
# Test with ffuf — all 1M 6-digit codes
ffuf -u "https://target.com/api/verify-otp" \
-X POST -H "Content-Type: application/json" \
-H "Cookie: session=YOUR_SESSION" \
-d '{"otp":"FUZZ"}' \
-w <(seq -w 000000 999999) \
-fc 400,429 -t 5
# -t 5 (slow down) — aggressive rates get 429 or ban
```
### Pattern 2: OTP Not Invalidated After Use
```
1. Login → receive OTP "123456" → enter it → success
2. Logout → login again with same credentials
3. Try OTP "123456" again
4. If accepted → OTP never invalidated = ATO (attacker sniffs OTP once, reuses forever)
```
### Pattern 3: Response Manipulation
```
1. Enter wrong OTP → capture response in Burp
2. Change {"success":false} → {"success":true} (or 401 → 200)
3. Forward → if app proceeds → client-side only MFA check
```
### Pattern 4: Skip MFA Step (Workflow Bypass)
```bash
# After entering password, app sets a "pre-mfa" cookie → redirects to /mfa
# Test: skip /mfa entirely, access /dashboard directly with pre-mfa cookie
…Read the whole file at its exact version.
How to install
mdr add adriannoes/awesome-agentic-ai/hunt-mfa-bypass@sha256:4af980aa272a9d3dThe line at the top of this page pins the label git:20260611.ff4cc7c, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_2662iwb3db2hpqqm)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jun 11, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (5762 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
adriannoes/awesome-agentic-ai · 69 stars · license MIT · pushed 2026-10-10 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_2662iwb3db2hpqqm GET https://markdownregistry.com/api/v1/resolve?ref=adriannoes/awesome-agentic-ai/hunt-mfa-bypass GET https://markdownregistry.com/api/v1/blob/4af980aa272a9d3d2b9f0562df5f4170f1ee6980a3260bcee521645efa2d0662
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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