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Security audit

Ayrshare

Security checks for vulnerabilities and agentic risk

Overview

The Ayrshare workflow is coherent, but setup can execute unverified downloads and introduce persistent changes to other agent applications without clearly obtaining approval.

Review and explicitly approve the CLI installation before use, preferably using a verified, pinned release. Decide whether to disable its startup skill synchronization and connect only the intended Ayrshare account. Publishing and deletion require confirmation in this skill. The remote installers and server-side connector implementation were not verified; no artifact evidence establishes malicious intent.

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
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (5)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied code performs remote script execution for an apparent Oomol CLI installation, not Ayrshare data operations. Nothing in the supplied chunk establishes this installer as a supporting dependency for Ayrshare, making its purpose and resource access materially inconsistent with the description. The downloaded script's further behavior cannot be determined from this chunk.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
84% confidence
Finding

The supplied code performs only an authentication command and provides no Ayrshare-specific operations or configuration. Authentication could support an Ayrshare integration, but no such relationship is established here; the visible behavior therefore differs materially from the declared purpose.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The command pipes an unpinned remote script directly into Bash without verifying its integrity or reviewing it before execution; the PowerShell alternative has the same trust problem. If the distribution endpoint or release pipeline is compromised, this can execute attacker-controlled code with the invoking user's permissions, potentially exposing local files and credentials; HTTPS and conditional setup do not eliminate that risk.

Content

Scanner excerpt · SKILL.md (reported line 65)May include surrounding context.

The setup workflow instructs the agent to execute remote installation scripts without warning the user about the system-integrity implications.

Medium
Category
Output Handling
Confidence
95% confidence
Finding

The missing-CLI fallback instructs installation through immediate execution of remotely retrieved code without explaining the system changes or obtaining installation-specific approval. Although this is a legitimate dependency setup path and runs only conditionally, the write/destructive confirmation rules concern Ayrshare state and do not clearly cover local software installation.

Content

No source excerpt is available for this finding.

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
80% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · SKILL.md (reported line 86)May include surrounding context.

md
- **`OOMOL_INSUFFICIENT_CREDIT`** — OOMOL billing stop. Recharge at `https://console.oomol.com/billing/token-recharge` before retrying.

- **HTTP 402 without `OOMOL_INSUFFICIENT_CREDIT`** — the third-party account itself has no active plan or credit. Report the provider error message as is; do not ask the user to recharge OOMOL.

## Resources