Security audit

Client Communication Engine

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed Greek accounting client-communication workflow with email sending gated by human approval.

Install this only where it is appropriate for a Greek accounting firm workflow, and configure SMTP with an app-specific credential. Review the approval roles and batch-send process before enabling email delivery, because the skill can send real client communications after approval.

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

Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Tool MisuseTool Parameter Abuse, Chaining Abuse, Unsafe Defaults
Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code

Findings (6)

Chaining Abuse

High

Category: Tool Misuse
Confidence: 75% confidence
Finding: Tool calls are chained to bypass individual safety checks or escalate capabilities beyond what any single tool call would allow.
Content: Scanner excerpt · SKILL.md (reported line 25)May include surrounding context.
export SMTP_HOST="smtp.your-provider.com" # e.g. smtp.gmail.com, smtp.outlook.com export SMTP_USER="accounting@yourfirm.gr" export SMTP_PASSWORD="app-specific-password" which jq curl || sudo apt install jq curl

text
SMTP credentials are required for sending client correspondence. All communications are drafted locally and require human review and approval before sending. Use app-specific passwords.

Natural-Language Policy Violations

Medium

Category: Not specified by scanner
Confidence: 94% confidence
Finding: This JSON file contains natural-language expectations that require a fixed language output ("Greek-language") for the generated communication. Under the policy, forcing a specific language without offering a user choice or documenting a justified locale constraint is a violation.
Content: No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium

Category: Not specified by scanner
Confidence: 94% confidence
Finding: The evaluation criteria explicitly require a "Greek-language document request," which is a natural-language locale constraint. No user opt-in or explicit justification for enforcing Greek appears in this file.
Content: No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium

Category: Not specified by scanner
Confidence: 93% confidence
Finding: The file specifies that generated reminders must be in Greek, creating a mandatory language policy in natural language. Because the file does not provide user choice or a documented region-specific rationale, this matches the language/locale policy violation category.
Content: No source excerpt is available for this finding.

Sudo/Root Execution

Medium

Category: Privilege Escalation
Confidence: 70% confidence
Finding: Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
Content: Scanner excerpt · SKILL.md (reported line 25)May include surrounding context.
export SMTP_HOST="smtp.your-provider.com" # e.g. smtp.gmail.com, smtp.outlook.com export SMTP_USER="accounting@yourfirm.gr" export SMTP_PASSWORD="app-specific-password" which jq curl || sudo apt install jq curl

text
SMTP credentials are required for sending client correspondence. All communications are drafted locally and require human review and approval before sending. Use app-specific passwords.

Natural-Language Policy Violations

Medium

Category: Not specified by scanner
Confidence: 97% confidence
Finding: The file states that communications to clients are in Greek and that the skill never sends English to a Greek client. This is a language policy constraint expressed as a hard rule, but the document does not frame the skill as explicitly limited to Greek-speaking clients only, nor does it present user/client language choice despite later mentioning possible language preference overrides.
Content: No source excerpt is available for this finding.