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Security audit

Accredible Certificates

Security checks for vulnerabilities and agentic risk

Overview

Certificate operations are clearly scoped, but setup can execute unverified downloaded code without a separate approval step.

Review and approve a verified CLI installation before allowing setup to run, including any automatic installation of additional agent skills. OOMOL will mediate access to certificate data. Keep the required approvals for creation and deletion. The remote installer contents could not be inspected; no malicious intent was established.

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 (4)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied code performs remote script execution and shows no Accredible integration or certificate data operations. Nothing in the supplied content establishes this installer as a supporting dependency for the declared purpose. The downloaded script's contents and any further effects are not available for assessment.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping a remotely fetched script directly into Bash executes mutable network-delivered code without verifying its contents, signature, or expected digest. Compromise of the installer distribution infrastructure could lead to arbitrary code execution, local credential theft, or file modification; HTTPS and the legitimate dependency context do not eliminate this supply-chain risk.

Content

Scanner excerpt · SKILL.md (reported line 62)May include surrounding context.

Fallback setup executes downloaded installer scripts without warning about remote code execution or local system changes.

Medium
Category
Output Handling
Confidence
96% confidence
Finding

The fallback directs the agent to execute downloaded shell or PowerShell code without requiring user approval for local software installation or explaining the resulting system changes. A missing CLI can therefore escalate an ordinary certificate-management request into execution of externally controlled code with the agent's local privileges, although the error-triggered setup limits exposure.

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 83)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