Security audit

flashformat

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward local file-format converter; its file access and optional writes are expected for the task, with only routine installation and scoping cautions.

Install in an isolated Python environment when possible, review the repository version you copy into Codex, and use the scripts only with files you intend the converter to read or overwrite.

A.I.G

Vulnerability Patterns

Insecure DependenciesIntroduces malicious components through unsafe dependency sources
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

Findings (1)

T08 · Insecure Dependencies

Warning

Location: README.md:20
Finding: Unpinned Dependency and Mutable Skill Installation Source
Content: View full analysis
Remediation: View remediation
``` 2. Generate and enforce cryptographic hashes: ```bash python -m pip install --require-hashes -r requirements.txt ``` 3. Document installation from a fixed, reviewed commit or immutable signed release instead of the mutable default branch: ```bash git clone https://github.com/phantom5125/flashformat-skills.git cd flashformat-skills git checkout ``` 4. Publish checksums or signed release artifacts and instruct users to verify them before copying files into `$CODEX_HOME/skills`. 5. Use an isolated virtual environment and avoid privileged installation. 6. Add automated dependency vulnerability scanning and periodically review the pinned version before controlled upgrades. ]]>

SkillSpector

Vulnerability Patterns

Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access

Findings (2)

Undeclared Tool Scope

Medium

Category: MCP Least Privilege
Confidence: 88% confidence
Finding: The skill advertises and instructs use of local conversion scripts that read from input files and optionally write to arbitrary output paths, but it declares no explicit tool scope or permission boundaries. In an agent environment, missing scope metadata can let the skill be invoked without clear constraints, increasing the chance of unintended file reads/writes across the repository or user workspace.
Content: No source excerpt is available for this finding.

Vague Triggers

Low

Category: Not specified by scanner
Confidence: 89% confidence
Finding: The manifest description says to use the skill when users ask for "local format conversion, batch processing, or CI-friendly text normalization," which is fairly broad and does not clearly bound when this skill should or should not activate. It lacks explicit negative examples or tighter trigger constraints, increasing the chance of unintended invocation for ordinary formatting requests.
Content: No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.