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Security audit

Open Construction Estimate

Security checks for vulnerabilities and agentic risk

Overview

This skill is a construction cost-estimation helper with disclosed local file and network use, but users should handle exported estimates and pricing database edits carefully.

Install only if you are comfortable letting the skill read pricing data, access pricing-related network endpoints, and write estimate reports or pricing CSVs. Treat exported Excel files and modified pricing databases as potentially sensitive business records, and choose output paths and data sources deliberately.

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
  • 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
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (4)

Description-Behavior Mismatch

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The manifest and overview describe a skill for accessing public pricing databases, matching BIM elements, and calculating costs. However, the OpenDatabaseManager section adds item creation, price updates, inflation adjustment, subset export, and full database save operations, which go beyond simple access and utilization into database maintenance and modification.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

Low
Category
Not specified by scanner
Confidence
86% confidence
Finding

The description frames the skill around open construction pricing databases and public unit price data. Listing RSMeans Online (subscription) introduces a non-open proprietary data source that does not align with the stated open/public focus.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
95% confidence
Finding

The file contains a quoted passage in Russian while the rest of the skill documentation is in English, with no indication that multilingual content is optional or region-specific. This can conflict with language/locale policy expectations when a skill presents a specific language without user opt-in or justification.

Content

No source excerpt is available for this finding.

Missing User Warnings

Low
Category
Not specified by scanner
Confidence
89% confidence
Finding

The export function writes project-derived estimate details to an arbitrary output path without any warning or guidance about handling potentially sensitive project data. In a real deployment, this can lead to unintended persistence of cost, scope, and building-component information on disk, especially if users assume the skill is read-only or ephemeral.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.