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Security audit

Suspicious File Scanner

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward file-scanning API wrapper, but users should understand that scanned files are uploaded to an external service.

Install only if you are comfortable sending the files you choose to scan to the mkkpro.com hosted API. Do not submit confidential, regulated, customer, credential-bearing, or legally restricted files unless you have approved that external processing and understand the provider's retention and privacy terms.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (5)

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
97% confidence
Finding

The skill instructs users to upload arbitrary files to a third-party service but does not clearly disclose that potentially sensitive file contents will leave the user's environment and be processed by an external operator. This creates a real data exfiltration and compliance risk, especially if users submit proprietary documents, credentials, customer data, or malware samples that are subject to handling restrictions.

Content

No source excerpt is available for this finding.

External Transmission

Medium
Category
Data Exfiltration
Confidence
95% confidence
Finding

The sample request sends raw file contents to an external domain, which is a genuine external transmission path. In the context of a file-scanning skill, this behavior is expected, but it is still security-relevant because users may unknowingly transmit confidential or regulated files to a third party.

Content

Scanner excerpt · SKILL.md (reported line 32)May include surrounding context.

bash
curl -X POST \
  -F "file=@/path/to/sample.exe" \
  https://api.mkkpro.com/security/suspicious-file-scanner/scan-file

Sample Response:

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% 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 · SKILL.md (reported line 132)May include surrounding context.

md
## References

- **Kong Route:** https://api.mkkpro.com/security/suspicious-file-scanner
- **API Docs:** https://api.mkkpro.com:8013/docs

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
88% confidence
Finding

The API accepts a binary file via multipart upload, which can affect user data and privacy, but the specification contains no description or warning about how uploaded files are processed, stored, or transmitted. For markdown/manifest-style skill descriptions, omission of such warnings is a missing user disclosure under SQP-2.

Content

No source excerpt is available for this finding.

Vague Triggers

Low
Category
Not specified by scanner
Confidence
79% confidence
Finding

This JSON file is a manifest/config-style API description, so SQP-1 applies. The operation is described only as "Scan File" with no constraints, invocation examples, or exclusion conditions, which makes the activation scope overly underspecified and increases the chance of unintended or overly broad use.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.