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Security audit

jobber

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed Jobber integration that can access and modify business data through Maton, with high-impact automation features documented but gated by explicit user approval.

Install only if you intend to use Maton to access a Jobber account and possibly create user-approved automations. Review every write, function deploy, trigger, or destination carefully, especially anything involving invoices, customer data, persistent forwarding, or API keys.

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
Vulnerability Patterns
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (3)

Intent-Code Divergence

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

Early in the file, the skill explicitly says 'Jobber is not an event source' and that triggers cannot read Jobber data. Later, the Webhooks section asserts that Jobber supports webhook event types such as CLIENT_CREATE and JOB_COMPLETE, which directly contradicts the earlier intent-setting guidance about event capabilities.

Content

No source excerpt is available for this finding.

Context-Inappropriate Capability

Medium
Category
Not specified by scanner
Confidence
96% confidence
Finding

The Jobber manifest says the skill is for Jobber API operations and explicitly states that Jobber is not an event source; this file instead documents Linear webhook events and how to use them. Even though the file notes it is shared platform reference text, it still exposes an unrelated capability that is not justified by the Jobber skill's stated purpose.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

Low
Category
Not specified by scanner
Confidence
84% confidence
Finding

The manifest frames the skill as a Jobber integration whose used endpoints are specifically documented, with additional platform reference text supposedly adding no Jobber capability. However, the file also documents and enables broad Maton function and trigger management, including creating, deploying, invoking, and wiring hosted code and destinations, which are capabilities beyond directly managing Jobber records/endpoints.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.