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Security audit

Yelp

Security checks for vulnerabilities and agentic risk

Overview

This Yelp skill is a disclosed, purpose-aligned helper for Yelp searches, review analysis, and listing audits, with no evidence of hidden or destructive behavior.

Before installing, be comfortable with Yelp receiving the search terms, location hints, phone numbers, and filters you ask the agent to use. Also expect local notes under ~/yelp/ unless you decline that setup.

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
  • 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 (11)

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 115)May include surrounding context.

bash
curl -sS -H "Authorization: Bearer ${YELP_API_KEY}" \
  "https://api.yelp.com/v3/businesses/search?location=New%20York&term=coffee" \
  | jq '.businesses[0] | {id, alias, name, rating, review_count}'

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 116)May include surrounding context.

bash
curl -sS -H "Authorization: Bearer ${YELP_API_KEY}" \
  "https://api.yelp.com/v3/businesses/search?location=New%20York&term=coffee" \
  | jq '.businesses[0] | {id, alias, name, rating, review_count}'

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 117)May include surrounding context.

bash
curl -sS -H "Authorization: Bearer ${YELP_API_KEY}" \
  "https://api.yelp.com/v3/businesses/search?location=New%20York&term=coffee" \
  | jq '.businesses[0] | {id, alias, name, rating, review_count}'

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 118)May include surrounding context.

bash
curl -sS -H "Authorization: Bearer ${YELP_API_KEY}" \
  "https://api.yelp.com/v3/businesses/search?location=New%20York&term=coffee" \
  | jq '.businesses[0] | {id, alias, name, rating, review_count}'

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 · api-workflows.md (reported line 9)May include surrounding context.

bash
curl -sS -H "Authorization: Bearer ${YELP_API_KEY}" \
  "https://api.yelp.com/v3/businesses/search?location=New%20York&term=coffee" \
  | jq '.businesses[0] | {id, alias, name, rating, review_count}'

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 · api-workflows.md (reported line 22)May include surrounding context.

bash
curl -sS -H "Authorization: Bearer ${YELP_API_KEY}" \
  "https://api.yelp.com/v3/businesses/search?location=New%20York&term=coffee" \
  | jq '.businesses[0] | {id, alias, name, rating, review_count}'

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 · api-workflows.md (reported line 32)May include surrounding context.

bash
curl -sS -H "Authorization: Bearer ${YELP_API_KEY}" \
  "https://api.yelp.com/v3/businesses/search?location=New%20York&term=coffee" \
  | jq '.businesses[0] | {id, alias, name, rating, review_count}'

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 · api-workflows.md (reported line 42)May include surrounding context.

bash
curl -sS -H "Authorization: Bearer ${YELP_API_KEY}" \
  "https://api.yelp.com/v3/businesses/search?location=New%20York&term=coffee" \
  | jq '.businesses[0] | {id, alias, name, rating, review_count}'

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 · api-workflows.md (reported line 46)May include surrounding context.

bash
curl -sS -H "Authorization: Bearer ${YELP_API_KEY}" \
  "https://api.yelp.com/v3/businesses/search?location=New%20York&term=coffee" \
  | jq '.businesses[0] | {id, alias, name, rating, review_count}'

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 · api-workflows.md (reported line 56)May include surrounding context.

bash
curl -sS -H "Authorization: Bearer ${YELP_API_KEY}" \
  "https://api.yelp.com/v3/businesses/search?location=New%20York&term=coffee" \
  | jq '.businesses[0] | {id, alias, name, rating, review_count}'

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
86% confidence
Finding

The file says to activate for 'Yelp-specific business search, review analysis, and local comparison requests,' but it does not define exclusions or negative examples for when similar local-search tasks should not invoke this skill. That broad scope can cause unintended activation for ordinary local recommendation or comparison requests that only loosely relate to Yelp.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.