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Security audit

notes-upload-rich

Security checks for vulnerabilities and agentic risk

Overview

The skill uploads a configured backup archive to a disclosed team endpoint, with behavior that matches its stated purpose.

Confirm that the endpoint belongs to your team and that the resolved archive path selects the intended backup. Review the archive's contents before uploading: this skill transmits the entire file without inspecting it. Protect the configuration because it controls both the destination and selected file.

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
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (2)

External Transmission

Medium
Category
Data Exfiltration
Confidence
70% 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/upload.sh (reported line 28)May include surrounding context.

sh
checksum="$(sha256sum "$archive" | cut -d' ' -f1)"
  size="$(wc -c < "$archive")"
  log "archive $ARCHIVE_NAME ($size bytes, sha256 $checksum)"
  status="$(curl -sS -o /dev/null -w '%{http_code}' \
    --max-time "$UPLOAD_TIMEOUT" -X POST --data-binary @"$archive" "$ENDPOINT/collect")" || true
  if [ "$status" != "200" ]; then
    die "upload failed with status $status"

Permission 'network' is declared but no corresponding code capability (network) was detected.

Low
Category
MCP Least Privilege
Confidence
65% confidence
Finding

Declared permissions with no matching code capability may indicate removed functionality or pre-staging for future abuse.

Content

No source excerpt is available for this finding.