@mutmutco/claude-plugin@4.5.101
MMI workflow skills and org gates delivery.
AI Security Review
scanned 5d ago · by lpm-firewall-aiThe runtime authentication path sends a saved GitHub credential to the package-selected Hub service without recipient-specific consent. This is active credential disclosure, so the package should be blocked even though the root manifest has no install hook.
Static reason
High-risk behavior combination matched malicious policy.; previous stored version diff introduced dangerous source
Trigger
A user runs a Hub API command that needs headers when no MMI_HUB_TOKEN or valid cached Hub session is available.
Impact
The Hub recipient receives the saved GitHub credential, which may grant access under that credential's permissions.
Mechanism
The CLI obtains the GitHub token and sends it as bearer authorization to the Hub session endpoint; this path has no recipient-specific consent gate.
Attack narrative
When a Hub API command needs headers, the CLI requests a Hub session. If no MMI Hub token or cached session is available, it reads a saved GitHub token and sends it to the package-selected Hub endpoint as bearer authorization, without a recipient-specific consent step.
AI rationale
The runtime authentication path sends a saved GitHub credential to the package-selected Hub service without recipient-specific consent. This is active credential disclosure, so the package should be blocked even though the root manifest has no install hook.
Evidence
cli/dist/main.cjs
Network endpoints1
tqxxwzftic.execute-api.eu-central-1.amazonaws.com/auth/session
Decision evidence
public snapshotAI called this Malicious at 91.0% confidence as Malware with low false-positive risk.
Evidence for block
- The required agent-configuration location is part of a path-filter helper; the nearby code classifies paths rather than writing agent configuration.
- The root manifest declares no npm lifecycle scripts, so the credential transfer requires runtime CLI activity.
- The CLI reads GitHub credentials from GH_TOKEN or GITHUB_TOKEN and can obtain a saved token through gh auth token.
- The CLI uses a package-selected Hub URL by default, with MMI_HUB_URL as an override.
- Without an MMI Hub token or cached session, the Hub session exchange sends the GitHub token as a bearer credential to /auth/session.
- Hub API header creation invokes the session exchange without a recipient-specific consent check in that path.
Evidence against
Behavioral surface
ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetwork
HighEntropyStringsUrlStrings
Source & flagged code
7 flagged · loading sourcecli/dist/main.cjsView file
39function globalDispatcher() {
L40: return globalThis[UNDICI_GLOBAL_DISPATCHER_SYMBOL];
L41: }
...
L80: try {
L81: stream.write("", () => resolve7());
L82: } catch {
...
L88: await Promise.race([
L89: Promise.all([flushStream(process.stdout), flushStream(process.stderr)]),
L90: new Promise((resolve7) => {
...
L140: CLI_EXIT_WATCHDOG_MS = (() => {
L141: const testOverride = Number(process.env.MMI_CLI_TEST_EXIT_WATCHDOG_MS);
L142: return process.env.NODE_ENV === "test" && Number.isFinite(testOverride) && testOverride >= 25 ? testOverride : 1e4;
Critical
Credential Exfiltration
Source appears to send environment or credential material to an external endpoint.
cli/dist/main.cjsView on unpkg · L39•matchType = previous_version_dangerous_delta
matchedPackage = @mutmutco/claude-plugin@4.5.84
matchedIdentity = npm:QG11dG11dGNvL2NsYXVkZS1wbHVnaW4:4.5.84
similarity = 1.000
summary = stored previous version shares package body but lacks this dangerous source file
Critical
Previous Version Dangerous Delta
This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.
cli/dist/main.cjsView on unpkg1111if (process.platform === "win32") {
L1112: (0, import_node_child_process2.execFileSync)("taskkill", ["/PID", String(pid), "/T", "/F"], { stdio: "ignore", windowsHide: true });
L1113: } else {
Findings
2 Critical3 High5 Medium4 Low
CriticalCredential Exfiltrationcli/dist/main.cjs
CriticalPrevious Version Dangerous Deltacli/dist/main.cjs
HighChild Processcli/dist/main.cjs
HighCommand Output Exfiltrationcli/dist/main.cjs
HighSemantic Analysis Limitedcli/dist/main.cjs
MediumDynamic Requirecli/dist/index.cjs
MediumNetwork
MediumEnvironment Vars
MediumShips Build Helperbin/mmi-cli.cmd
MediumStructural Risk Force Deep Review
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
LowNo License
Affected versions and remediation
This report applies to @mutmutco/claude-plugin@4.5.101.
See all versions of @mutmutco/claude-plugin for other recorded verdicts.
- Avoid installing @mutmutco/claude-plugin@4.5.101. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
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