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Security audit

daily-briefing

Security checks for vulnerabilities and agentic risk

Overview

This daily briefing skill is coherent and disclosed, but users should know it may summarize recent private messages and calendar events when invoked.

Install only if you are comfortable with a daily briefing tool reading near-term calendar events and unread or important recent messages when you ask for a digest. Prefer explicit invocations and disable or avoid news/weather lookups if you do not want location or topical queries sent to external services.

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 (6)

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
88% confidence
Finding

The top-level description uses broad trigger language like 'daily digest', 'morning briefing', and 'quick overview of what matters today', which can overlap with ordinary conversation and cause unintended activation. In this skill, accidental invocation is more concerning because the workflow may access calendar, unread messages, and web search without an explicit, task-scoped confirmation.

Content

No source excerpt is available for this finding.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
86% confidence
Finding

The 'When to Use' section includes ambiguous conditions such as 'what's going on today' and generic morning check-ins, which increases the chance the skill runs in contexts where the user did not intend a privacy-sensitive aggregation. Because the skill combines multiple personal and external data sources, loose invocation guidance materially raises the risk of over-collection and surprise data access.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
93% confidence
Finding

The skill instructs the agent to summarize unread or important messages and upcoming calendar events but does not clearly warn that private communications and schedule data will be accessed. This is dangerous because users may trigger the skill for a simple summary without realizing it will inspect sensitive personal content, creating privacy and consent issues.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
84% confidence
Finding

The inputs specify locale with a default of en, which imposes a specific language by default. The file does not indicate that the user is asked to choose a language or that the English default is justified by a documented regional constraint.

Content

No source excerpt is available for this finding.

Missing User Warnings

Low
Category
Not specified by scanner
Confidence
83% confidence
Finding

The skill may use wttr.in and web_search to retrieve weather and news, but it does not disclose that user context such as location, timezone, or inferred interests may be sent to external services. This creates a data-sharing risk, particularly when the briefing is generated automatically or as part of a recurring digest.

Content

No source excerpt is available for this finding.

Vague Triggers

Low
Category
Not specified by scanner
Confidence
86% confidence
Finding

This manifest file describes the skill's purpose in general terms but does not specify how or when it should be invoked, nor does it provide any constraints or exclusion conditions. Because manifest files are in scope for vague-trigger review, the lack of trigger specificity could allow overly broad matching against common requests for a daily summary.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.