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Security audit

Pipedrive

Security checks for vulnerabilities and agentic risk

Overview

This skill provides disclosed, user-directed access to Pipedrive CRM records, with no evidence of credential theft or hidden activity.

Connect an account with only the CRM permissions you need, verify the configured API destination belongs to Pipedrive, and protect the locally stored OAuth credentials. Creating or updating records affects your live CRM, so give clear instructions about intended changes.

A.I.G

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Taint TrackingDirect Taint Flow, Variable-Mediated Taint Flow, Credential Exfiltration Chain
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (5)

Tainted flow: 'request' from os.environ.get (line 91, credential/environment) → urllib.request.urlopen (network output)

Critical
Category
Data Flow
Confidence
90% confidence
Finding

Credentials or environment variables flow to a network sink. This is a high-confidence indicator of credential exfiltration.

Content

Scanner excerpt · scripts/server.py (reported line 99)May include surrounding context.

python
)
    context = ssl.create_default_context(cafile=certifi.where())
    try:
        with urllib.request.urlopen(request, timeout=30, context=context) as response:
            raw = response.read().decode("utf-8")
            if not raw:
                return {"success": True, "data": None}

Credential Access

High
Category
Privilege Escalation
Confidence
70% confidence
Finding

Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Content

Scanner excerpt · SKILL.md (reported line 39)May include surrounding context.

Quick start

This skill is a thin pass-through to a local stdio MCP server. mcporter spawns the skill's Python server on each call, refreshes the OAuth access token when needed, and injects the fresh token into the server env.

sh
mcporter --config {baseDir}/mcporter.json list maverick-pipedrive --schema

Credential Access

High
Category
Privilege Escalation
Confidence
70% confidence
Finding

Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Content

Scanner excerpt · SKILL.md (reported line 71)May include surrounding context.

md
- `MAVERICK_PIPEDRIVE_MCP_EXPIRES_IN`
- `MAVERICK_PIPEDRIVE_MCP_REFRESH_TOKEN_EXPIRES_AT`

mcporter refreshes expired Pipedrive access tokens through Pipedrive's token endpoint before spawning the stdio server, then injects the token into `MAVERICK_PIPEDRIVE_MCP_ACCESS_TOKEN`. If calls keep returning auth errors after retry, the OAuth grant has likely been revoked or expired; reconnect the integration.

## Data flow

Skill declares no tool scope ('permissions' or 'allowed-tools') but code capabilities were detected: env, network.

Medium
Category
MCP Least Privilege
Confidence
70% confidence
Finding

Without declared permissions the skill's intent is opaque and cannot be validated.

Content

No source excerpt is available for this finding.

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · scripts/server.py (reported line 26)May include surrounding context.

python
mcp = FastMCP("pipedrive")

_API_BASE = os.environ.get("MAVERICK_PIPEDRIVE_MCP_API_BASE", "https://api.pipedrive.com/api").rstrip("/")
_ACCESS_TOKEN_ENV = "MAVERICK_PIPEDRIVE_MCP_ACCESS_TOKEN"