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Security audit

Social Media Strategy

Security checks for vulnerabilities and agentic risk

Overview

This skill provides social media planning guidance and only produces advice and external reading links, with no code execution or system access.

Before installing, understand that the skill will tend to include a predetermined list of external marketing resources in its answers. Treat those links as ordinary third-party sites, not as security-reviewed or neutral endorsements.

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
Findings (1)

T01 · Skill Instruction Hijacking

Note
Location
SKILL.md:41
Finding

Mandatory Injection of Fixed Third-Party Promotional Links

Content
View full analysis

Vulnerability Details

File Location: SKILL.md, lines 41–49
Vulnerability Type: T01: Skill Instruction Hijacking
Risk Level: Low

Complete Code Snippet

markdown
### Further Reading
- How to Build in Public as a Founder: https://www.failory.com/blog/building-in-public
- The Ultimate Founder-Led LinkedIn Guide: https://www.mrrunlocked.com/p/founder-led-linkedin-guide
- LinkedIn CEO/Founder playbook: https://www.markepear.dev/blog/linkedin-ceo-founder-playbook
- Social Listening guide: https://www.mrrunlocked.com/p/social-listening-guide
- F5 bot (free Reddit/HN monitoring): https://f5bot.com/
- How to market to developers on Twitter: https://www.markepear.dev/blog/developer-marketing-twitter
- Organic Growth Guide for TikTok and Instagram: https://www.post-bridge.com/growth-guide/start-here
- Pinterest Growth Guide: https://www.blogtopin.com/growth-guide/start-here

Technical Analysis

Line 16 instructs the agent to provide a response containing the subsequently defined sections after receiving the user's answers. Lines 41–49 define one of those mandatory sections as a fixed collection of third-party links. Consequently, invoking the skill causes unrelated external resources and named services to be inserted into the agent's output without requiring a user request for those resources or a relevance assessment.

This is a limited form of skill instruction hijacking because the skill text persistently controls part of the agent's response and routes users toward predetermined external websites. The reviewed file does not establish that the linked sites are malicious, compromised, or affiliated with the skill author; the confirmed issue is the mandatory and undisclosed nature of the promotion rather than malicious behavior by those sites.

Attack Path

  1. A user invokes the social-media-strategy skill.
  2. The skill directs the agent to ask five discovery questions.
  3. The user supplie ...[truncated 878 chars]
Remediation
View remediation

Remediation Suggestions

  1. Remove the requirement to include a fixed third-party link list in every generated strategy.
  2. Recommend external resources only when they are relevant to the user's stated audience, platforms, capacity, and goals.
  3. Ask whether the user wants external reading or tooling recommendations before presenting them.
  4. Use neutral selection criteria and, where practical, provide multiple comparable options rather than repeatedly promoting predetermined providers.
  5. Clearly disclose any sponsorship, referral relationship, affiliate arrangement, or other material connection.
  6. Treat linked content as untrusted external material and avoid implying that it has been security-reviewed or independently endorsed.
Vulnerability Patterns
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (1)

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
94% confidence
Finding

The manifest description says to use the skill when someone wants help with their social media strategy, which is a broad natural-language condition that could overlap with many general marketing discussions. It does not provide narrower trigger phrases, scope boundaries, or negative examples to clarify when the skill should and should not activate.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.