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 agentmods add rules/atlassian/forge-skills/_index-authn-authzgit clone --depth 1 https://github.com/atlassian/forge-skillsWrote 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/rules/atlassian/forge-skills/_index-authn-authz)<a href="https://agentmods.dev/rules/atlassian/forge-skills/_index-authn-authz"><img src="https://agentmods.dev/badge/rules/atlassian/forge-skills/_index-authn-authz.svg" alt="Measured on agentmods" 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 | $0.00000 | $0.00478 |
| Opus 5 | $0.00000 | $0.00239 |
| Sonnet 5 | $0.00000 | $0.00096 |
| Haiku 4.5 | $0.00000 | $0.00048 |
Grade A, and why
_index-authn-authz 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 6d 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.
What it actually says
- Scope: Authentication mechanisms, authorization checks, privilege boundaries, and access control in Forge apps.
- Priority: Broken Authentication and Session Management is the #1 bug bounty category (~43% of submissions).
Key Forge AuthN/AuthZ Risks
asApp()vsasUser()privilege escalation: asApp has broader permissions than asUser; missing authz checks before asApp calls.- Display conditions are NOT authorization: Display conditions only hide UI; attackers can invoke modules directly via GraphQL.
- Web triggers lack built-in auth: Must implement custom authentication and validation.
- Resolver-side authorization missing: Client-provided context is untrusted; all sensitive actions require server-side checks.
- Forge context manipulation: Elements of context can be attacker-controlled (EPSP-300).
Subrules
- asApp Privilege Escalation →
@forge-authn-authz/asapp-privilege-escalation.mdc - Prefer Using Function Context Object →
@forge-authn-authz/prefer-context-authz.mdc - Missing Resolver Authorization →
@forge-authn-authz/missing-resolver-authz.mdc - Display Conditions Bypass →
@forge-authn-authz/display-conditions-bypass.mdc
Detection Heuristics
- Search for
asApp()calls without preceding permission/role checks. - Identify resolvers that access/mutate data based solely on payload IDs without ownership validation.
- Look for display conditions in manifest without corresponding resolver-side authorization.
- Find web triggers without authentication header validation or signature checks.
Dynamic Testing Tools
- Direct GraphQL invocation to bypass UI
- Multi-account testing for privilege boundaries
CWE References
- CWE-862: Missing Authorization
- CWE-863: Incorrect Authorization
- CWE-284: Improper Access Control
- CWE-306: Missing Authentication for Critical Function
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.
- 6d ago First seen · 48 lines · 0 tokens per session scan A c4ecf596e905
_index-authn-authz is a cursor rule published in the GitHub repository atlassian/forge-skills (21 stars, last pushed today), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 478 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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