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Rule Reference

SEC682lintai-ai-securitystablejsonwarn

Plugin hook: webhook secret exfiltration

Plugin hook command posts secret material to a webhook endpoint

Provider
lintai-ai-security
Surface
json
Scope
per_file
Tier
stable
Severity
warn
Confidence
high
Detection
structural
Remediation
message_only

Activation Model

Preset Membership

This rule is part of the builtin activation graph through these preset memberships.

basemembership
mcpmembership

Lifecycle

Stable Lifecycle Contract

State

stable_gated

Graduation rationale

Checks committed plugin hook command values for secret-bearing posts to webhook endpoints.

Deterministic signal basis

JsonSignals command-string analysis over ArtifactKind::CursorPluginHooks for secret markers plus webhook endpoint markers such as `hooks.slack.com/services/` or `discord.com/api/webhooks/`.

Malicious corpus
plugin-hook-command-secret-exfil-payloads
Benign corpus
plugin-hook-command-safe
structured evidence required remediation reviewed
Canonical note

Structural stable rule intended as a high-precision check with deterministic evidence.

Nearby Signals

Related Rules

SEC301MCP config: shell trampolineMCP configuration shells out through sh -c or bash -cjsonstable
SEC302Config: insecure HTTP endpointConfiguration contains an insecure http:// endpointjsonstable
SEC303MCP config: credential env passthroughMCP configuration passes through credential environment variablesjsonstable
SEC304Config: TLS verification disabledConfiguration disables TLS or certificate verificationjsonstable
SEC305Config: hardcoded auth materialConfiguration embeds static authentication material in a connection or auth valuejsonstable
SEC309Config: literal secrets in configConfiguration commits literal secret material in env, auth, or header valuesjsonstable

Why It Matters ​

Webhook endpoints are a simple exfiltration sink for attacker-controlled collection of tokens and credentials.

What Triggers ​

SEC682 matches committed plugin hook commands that combine secret markers with webhook endpoints such as Slack incoming webhooks or Discord webhooks.

False Positives ​

Status or alert webhooks are common, but they should not carry copied secrets or credentials in the request.

Remediation ​

Remove the secret-bearing webhook post from the committed plugin hook and keep notifications free of credential material.