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Security audit

OCR Web Service

Security checks for vulnerabilities and agentic risk

Overview

Review is warranted because setup runs unverified remote code, and the required CLI documents persistent changes to agent skills that this skill does not explain.

Review and install a verified CLI release yourself before enabling this skill. Disable startup skill synchronization with OO_SKILLS_SYNC_DISABLED=1 if you do not want additional agent skills installed or refreshed. Send only documents you authorize OOMOL and OCR Web Service to process, and consider page-credit costs. The complete bundled artifact was inspected, but remote installer contents and hosted connector protections remain unverified.

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 command contains no OCR Web Service interaction. It instead executes a remote installer from an unrelated domain, with no demonstrated connection to the declared OCR functionality. The downloaded script's contents and resulting system changes cannot be determined from this chunk.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping the installer URL directly into bash executes whatever the endpoint currently serves, without a pinned version or independent integrity verification. HTTPS protects transport but not a compromised publisher or distribution service, creating a potential route to local code execution and access to agent-readable files or credentials; this is the same underlying issue as SQP-2.

Content

Scanner excerpt · SKILL.md (reported line 56)May include surrounding context.

The document-processing action uploads content but is classified as a read-only action.

Medium
Category
Excessive Agency
Confidence
95% confidence
Finding

The processing action downloads a document and uploads it to an external OCR provider, yet the blanket rule treats untagged actions as reads that are safe to run directly. This can obscure external disclosure and quota consumption; the explicit public-URL requirement and an ordinary user request for OCR reduce the risk, but do not make processing side-effect-free.

Content

No source excerpt is available for this finding.

First-time setup instructs execution of remotely downloaded scripts without a system-integrity warning.

Medium
Category
Output Handling
Confidence
97% confidence
Finding

The setup instructions pipe remotely retrieved shell and PowerShell scripts directly into interpreters without establishing a reviewed or pinned artifact. If the distribution endpoint or release pipeline is compromised, the script can execute with the agent process's privileges; limiting installation to a missing-CLI error reduces frequency but not the consequences.

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 77)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