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Security audit

SimpleLocalize

Security checks for vulnerabilities and agentic risk

Overview

The SimpleLocalize actions require appropriate approvals, but the required CLI can also install or update other agent skills without this skill explaining those changes.

Review the CLI's broader installation effects before proceeding, and ensure you accept OOMOL handling your SimpleLocalize requests and connected credentials. Prefer a vetted fixed CLI release. Upstream provides OO_SKILLS_SYNC_DISABLED=1 to disable startup skill synchronization; separately review any skills added during installation. The remote installers and deployed connector implementation were not inspected, so their exact behavior remains uncertain.

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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (4)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
98% confidence
Finding

The visible command executes an Oomol-hosted installer, with no demonstrated connection to SimpleLocalize or its data-management functions. This introduces remote code execution and installation behavior not represented by the description. The downloaded script is not supplied, so its specific effects cannot be determined.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The setup instructions pipe a remotely fetched, unpinned script directly into Bash; the PowerShell alternative similarly executes downloaded content with iex. If the distribution endpoint or release pipeline is compromised, attacker-controlled code could run with the agent's local privileges and access files or credentials. The missing-CLI condition limits exposure, but the instructions provide no integrity verification or explicit installation approval gate.

Content

Scanner excerpt · SKILL.md (reported line 63)May include surrounding context.

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 84)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

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 89)May include surrounding context.

md
## Resources

- SimpleLocalize homepage: https://simplelocalize.io
- API documentation: https://api.simplelocalize.io/openapi/docs