Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add SecurityTalent/bugskill-ai --skill saml-sso-assertion-attacksgit clone --depth 1 https://github.com/SecurityTalent/bugskill-aiWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/securitytalent/bugskill-ai/saml-sso-assertion-attacks)<a href="https://agentmods.dev/skills/securitytalent/bugskill-ai/saml-sso-assertion-attacks"><img src="https://agentmods.dev/badge/skills/securitytalent/bugskill-ai/saml-sso-assertion-attacks/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/securitytalent/bugskill-ai/saml-sso-assertion-attacks"><img src="https://agentmods.dev/badge/skills/securitytalent/bugskill-ai/saml-sso-assertion-attacks.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00044 | $0.00469 |
| Opus 5.5 | $0.00018 | $0.00188 |
| Sonnet 5.5 | $0.00009 | $0.00094 |
| Haiku 4.5 | $0.00004 | $0.00047 |
Grade A, and why
saml-sso-assertion-attacks scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
100% identical to saml-sso-assertion-attacks — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
SKILL: SAML SSO and Assertion Attacks — Signature Validation, Binding, and Trust Confusion
AI LOAD INSTRUCTION: Use this skill when the target uses SAML-based SSO and you need to validate assertion trust: signature coverage, audience and recipient checks, ACS handling, XML parsing weaknesses, and IdP/SP confusion.
1. WHEN TO LOAD THIS SKILL
Load when:
- Enterprise SSO uses SAML requests or responses
- You see
SAMLRequest,SAMLResponse, XML assertions, or ACS endpoints - Login flows involve an external IdP and browser POST/redirect binding
2. HIGH-VALUE MISCONFIGURATION CHECKS
| Theme | What to Check |
|---|---|
| signature validation | unsigned assertion accepted, wrong node signed, signature wrapping |
| audience and recipient | weak Audience, Recipient, Destination, or ACS validation |
| issuer trust | wrong IdP accepted or multi-tenant issuer confusion |
| replay and freshness | missing InResponseTo, weak NotBefore / NotOnOrAfter enforcement |
| account mapping | email-only binding, case folding, unverified attributes |
| XML parser behavior | XXE-like parser issues or unsafe transforms around SAML documents |
3. QUICK TRIAGE
- Capture one full login round trip.
- Inspect which XML nodes are signed and which attributes drive account binding.
- Compare SP-initiated and IdP-initiated flows.
- Test replay, altered attributes, and assertion placement confusion.
4. RELATED ROUTES
- XML parser attack depth: xxe xml external entity
- OAuth or OIDC SSO alternatives: oauth oidc misconfiguration
- Auth boundary issues after SSO: authbypass authentication flaws
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 41 lines · 44 tokens per session scan A f8c00817762b
saml-sso-assertion-attacks is a skill published in the GitHub repository SecurityTalent/bugskill-ai (13 stars, last pushed 21d ago), licensed MIT. It adds 44 tokens to every session and 469 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to saml-sso-assertion-attacks, differing in 0 lines, and is treated as a copy.
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