registry / Credential exfiltration / @mutmutco/codex-plugin
@mutmutco/codex-plugin
MMI workflow skills and org gates delivery.
This report shows the evidence for @mutmutco/codex-plugin@4.5.133. 2 of 226 known versions are blocked or flagged. The newest version, 4.5.184, is allowed. See all versions.
AI Security Review
scanned 4d ago · by lpm-firewall-aiThe CLI forwards a locally available GitHub credential to the package-selected MMI Hub during ordinary Hub authentication without recipient-specific consent. This is concrete credential exposure, so the package should be blocked.
Static reason
High-risk behavior combination matched malicious policy.; previous stored version diff introduced dangerous source
Trigger
A CLI operation that requests an MMI Hub session, such as a Hub-backed board operation.
Impact
The MMI Hub receives a GitHub credential that may permit access to the user's GitHub account; the source does not establish how the recipient uses it.
Mechanism
The CLI obtains a token from environment variables or `gh auth token`, then sends it as bearer authentication to the Hub session endpoint at the default MMI endpoint.
Attack narrative
During Hub authentication, the CLI can read a saved GitHub token from environment variables or the GitHub CLI and send it as bearer authentication to the package-selected MMI Hub. The normal path has no recipient-specific consent check. This exposes the GitHub credential to that recipient; the source does not show subsequent use.
AI rationale
The CLI forwards a locally available GitHub credential to the package-selected MMI Hub during ordinary Hub authentication without recipient-specific consent. This is concrete credential exposure, so the package should be blocked.
Evidence
cli/dist/main.cjs
Network endpoints1
tqxxwzftic.execute-api.eu-central-1.amazonaws.com
Decision evidence
public snapshotAI called this Malicious at 93.0% confidence as Malware with low false-positive risk.
Evidence for block
- The cited agent-related code only filters untracked agent configuration and session paths in a Git cleanliness check; it does not write agent settings.
- The CLI reads GitHub credentials from environment variables or from the GitHub CLI token command.
- When a Hub session is not cached, the normal path sends the GitHub token as bearer authentication to the Hub session endpoint; an MMI Hub token can bypass that path but is not required to use it.
- The Hub recipient defaults to the package-selected MMI endpoint, and shared Hub headers obtain authentication using the GitHub token.
- A Hub-backed board operation uses those shared authenticated headers.
- The manifest contains no npm lifecycle scripts; the credential transfer occurs during CLI runtime.
Evidence against
- The package also sends limited command, version, operating-system, and CI telemetry to the Hub, with an environment-variable opt-out; that telemetry does not account for the GitHub credential transfer.
Behavioral surface
ChildProcessCryptoDynamicRequire
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("", () => resolve8());
L82: } catch {
...
L88: await Promise.race([
L89: Promise.all([flushStream(process.stdout), flushStream(process.stderr)]),
L90: new Promise((resolve8) => {
...
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/codex-plugin@4.5.84
matchedIdentity = npm:QG11dG11dGNvL2NvZGV4LXBsdWdpbg: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 unpkg1115if (process.platform === "win32") {
L1116: (0, import_node_child_process2.execFileSync)("taskkill", ["/PID", String(pid), "/T", "/F"], { stdio: "ignore", windowsHide: true });
L1117: } 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/codex-plugin@4.5.133.
The versions list below shows the verdict for each recorded version.
- Avoid installing @mutmutco/codex-plugin@4.5.133. 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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