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SignUpGenius MCP server — read sign-ups, reports, and groups; add group members.
The publisher performed an authenticated act of publication — proving control of a namespace in the official MCP registry, or appearing in a first-party catalogue an operator curates. That establishes WHO published it. It is not a security finding, and attested artifacts carry Flagged verdicts too.
331 critical findings reported by cisco-skill-scanner, agent-audit-kit, 4 of them in the installed artifact. The composite score alone does not reflect this — read the per-scanner reports below.
This artifact ships from 3 sources and their verdicts differ. The worst is github (Flagged). Installing from a cleaner source does not mean the others are safe — check the source you actually install from.
github: https://github.com/chrischall/signupgenius-mcp, 384 findings
Choose your runtime: the CLI writes the mcpServers config entry for that target.
nerlo install --target claude-code -- signupgenius-mcp
Install respects the composite badge: Clean proceeds, Caution prompts for confirmation, and Flagged is refused. Write operations require an API token.
6 of 11 scanners examined this package. The rest do not apply to it — language, ecosystem and packaging decide which analyzers can say anything, and a scanner that cannot examine an artifact reports nothing rather than passing it.
v1.4.0
0 findings · 0.6s
v2.0.11
16 findings · 8.3s
v0.3.26
365 findings · 1.3s
v0.1.0
2 findings · 27.8s
v0.1.0
0 findings · 27.8s
v0.1.0
0 findings · 20.5s
No report in this scan: capslock, govulncheck, osv-scanner, trivy, trivy_image.
2 scans on record. Every scan's full results are retained immutably for 24 months.
| Completed | Composite | Change | Scanners | Status |
|---|---|---|---|---|
| Aug 3, 2026 | Scan Halted | — | agentshield: completecisco-skill-scanner: completeagent-audit-kit: completenerlo-behavioral: completenerlo-install-instruction: completenerlo-multi-source: complete | rejected |
| Jul 31, 2026 | Scan Halted | — | agentshield: completecisco-skill-scanner: completeagent-audit-kit: completenerlo-behavioral: completenerlo-install-instruction: completenerlo-multi-source: complete | rejected |
Findings in files this artifact installs stand as reported; a model re-read the rest and said which ones it believes are false positives. This is a second opinion published beside the evidence, not a correction to it: the per-scanner reports above are unchanged, every dismissed finding is still listed there at its original severity, and the score and the Flagged badge are computed from those raw severities alone. Nothing below moved them.
Out of 383 findings across every scanner that examined this package. 327 of 331 findings rated critical by their scanner were among the dismissals.
Two keys had to turn. The model had to name a reason from a fixed list of six, and a deterministic check of ours — over which files this artifact actually installs — had to independently agree. Anything it could not corroborate is in “not reviewed” above, at full severity.
335 Agent instruction file — The match is in a file that instructs an AI coding agent — a CLAUDE.md or similar. It is documentation of intent, and our own check confirmed it is not part of what gets installed.
Rules: AAK-AGENT-001, AAK-AGENT-002, AAK-AGENT-003 and 1 more · Files: CLAUDE.md · reported by agent-audit-kit
7 Test or fixture file — The match is in a test or fixture. Our own check confirmed the file is not part of what gets installed.
Rules: AAK-SSRF-001, AAK-SSRF-005, AAK-MCP-018 · Files: tests/tools/public-signup.test.ts, tests/tools/rsvp.test.ts, tests/tools/_setup.ts · reported by agent-audit-kit
6 CI or editor configuration — The match is in build, CI or editor configuration, confirmed by our own check to be outside the installed artifact.
Rules: AAK-GHA-IMMUTABLE-001 · Files: .github/workflows/release-please.yml, .github/workflows/ci.yml, .github/workflows/pr-auto-review.yml and 2 more · reported by agent-audit-kit
These findings are in files this artifact installs and are not placeholder values. No false-positive basis can be corroborated for such a finding, so this review never dismisses one; they were not sent to the model and stand at their scanner's severity.
6 AAK-MCP-018
Files: src/tools/rsvp.ts, src/tools/signups.ts, src/tools/groups.ts and 3 more · reported by agent-audit-kit
6 DATA_EXFIL_JS_NETWORK
Files: /repo/src/auth-session-login.ts, /repo/src/auth.ts, /repo/src/client.ts and 1 more · reported by cisco-skill-scanner
4 MANIFEST_MISSING_LICENSE
Files: /repo/skills/signupgenius/SKILL.md, /repo/skills/signupgenius-api/SKILL.md, /repo/SKILL.md and 1 more · reported by cisco-skill-scanner
2 AAK-SECRET-004
Files: src/tools/signups.ts · reported by agent-audit-kit
2 AAK-SSRF-001
Files: src/tools/rsvp.ts, src/tools/public-signup.ts · reported by agent-audit-kit
2 AAK-SSRF-005
Files:
Critical vulnerabilities found, including SSRF and code injection.
The artifact exhibits critical server-side request forgery (SSRF) vulnerabilities in `src/tools/public-signup.ts` and `src/tools/rsvp.ts`, which could allow network egress to internal resources. It also contains a critical coercive injection vulnerability in `/repo/src/auth-session-login.ts` and a critical taint vulnerability in `src/tools/public-signup.ts`. Additionally, high-severity findings include potential secret exposure leading to network egress from `/repo/src/auth.ts` and further SSRF risks in `src/tools/public-signup.ts` and `src/tools/rsvp.ts`.
Concern level assessed by the review: Critical. This is the review's scale, not the registry badge.
Reviewed by gemini-2.5-flash. The model sees the findings, not your code, and cannot change a score.
2 HIDDEN_DATA_FILE
Files: /repo/.mcpbignore, /repo/.release-please-manifest.json · reported by cisco-skill-scanner
2 SOCIAL_ENG_VAGUE_DESCRIPTION
Files: /repo/SKILL.md, /repo/skills/signupgenius-api/references/SKILL.md · reported by cisco-skill-scanner
1 AAK-MARKETPLACE-001
Files: .claude-plugin/marketplace.json · reported by agent-audit-kit
1 AAK-OAUTH-3P-001
Files: package.json · reported by agent-audit-kit
1 AAK-SEC-MD-001
Files: SECURITY.md · reported by agent-audit-kit
1 AAK-SUPPLY-005
Files: package-lock.json · reported by agent-audit-kit
1 AAK-TAINT-001
Files: src/tools/public-signup.ts · reported by agent-audit-kit
1 LOW_ANALYZABILITY
Files: /repo · reported by cisco-skill-scanner
1 opt.nerlo-rules.nerlo-hardcoded-external-egress
Files: /repo/src/auth.ts · reported by nerlo-behavioral
1 opt.nerlo-rules.nerlo-js-secret-to-network-egress
Files: /repo/src/auth.ts · reported by nerlo-behavioral
1 YARA_coercive_injection_generic
Files: /repo/src/auth-session-login.ts · reported by cisco-skill-scanner