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Security audit

Foxit Cloud API

Security checks for vulnerabilities and agentic risk

Overview

This Foxit integration needs review because it treats document-changing operations as reads and can execute an unverified remote installer.

Review before installing. Correct the read/write classifications and require clear authorization for processing jobs, document changes, uploads, and quota use. Install a verified CLI release under your control and review its automatic skill synchronization. Documents pass through Foxit and OOMOL-related services; their runtime handling and retention were not verified. No 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
98% confidence
Finding

The supplied chunk performs remote installer execution, not Foxit Cloud API operations. Nothing in the supplied content establishes that this installer is a necessary supporting dependency for Foxit access. The installer's downstream behavior is unknown, but downloading and executing it is directly observable and materially outside the declared purpose.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The setup command executes a remotely fetched, mutable script without checking a pinned version, checksum, or signature; the PowerShell alternative has the same weakness. Compromise of the distribution endpoint or release pipeline could execute attacker-controlled code with the agent's local privileges, although the missing-CLI prerequisite limits when this path is reached.

Content

Scanner excerpt · SKILL.md (reported line 76)May include surrounding context.

The safety instructions classify untagged document-processing actions as reads, bypassing confirmation for state-changing operations.

Medium
Category
Excessive Agency
Confidence
98% confidence
Finding

The blanket claim that untagged actions are reads contradicts descriptions of actions that submit processing tasks, create documents, or upload results to transit storage. Treating those actions as safe to run directly bypasses the skill's confirmation policy and can cause unapproved processing, storage, or quota consumption, although the text does not establish that these operations overwrite source documents.

Content

No source excerpt is available for this finding.

The safety instructions classify untagged document-changing actions as reads and authorize running them without confirmation.

Medium
Category
Output Handling
Confidence
97% confidence
Finding

This finding identifies the same confirmation-policy defect as SDI-4: document-processing actions are untagged and therefore incorrectly authorized as reads. That classification can bypass approval for consequential operations, but action names alone do not prove destructive modification of existing files.

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 97)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