Trust Assessment
session-handoff received a trust score of 10/100, placing it in the Untrusted category. This skill has significant security findings that require attention before use in production.
SkillShield's automated analysis identified 6 findings: 2 critical, 2 high, 2 medium, and 0 low severity. Key findings include Arbitrary command execution, Dangerous call: subprocess.run(), Arbitrary File Existence Check via Handoff 'project_path' and 'modified_files'.
The analysis covered 4 layers: Manifest Analysis, Static Code Analysis, Dependency Graph, LLM Behavioral Safety. The Manifest Analysis layer scored lowest at 40/100, indicating areas for improvement.
Last analyzed on February 13, 2026 (commit 13146e6a). SkillShield performs automated 4-layer security analysis on AI skills and MCP servers.
Layer Breakdown
Behavioral Risk Signals
Security Findings6
| Severity | Finding | Layer | Location | |
|---|---|---|---|---|
| CRITICAL | Arbitrary command execution Python shell execution (os.system, subprocess) Review all shell execution calls. Ensure commands are static (not built from user input), use absolute paths, and are strictly necessary. Prefer library APIs over shell commands. | Manifest | skills/wpank/session-handoff/scripts/check_staleness.py:28 | |
| CRITICAL | Arbitrary command execution Python shell execution (os.system, subprocess) Review all shell execution calls. Ensure commands are static (not built from user input), use absolute paths, and are strictly necessary. Prefer library APIs over shell commands. | Manifest | skills/wpank/session-handoff/scripts/create_handoff.py:32 | |
| HIGH | Dangerous call: subprocess.run() Call to 'subprocess.run()' detected in function 'run_cmd'. This can execute arbitrary code. Avoid using dangerous functions like exec/eval/os.system. Use safer alternatives. | Static | skills/wpank/session-handoff/scripts/check_staleness.py:28 | |
| HIGH | Dangerous call: subprocess.run() Call to 'subprocess.run()' detected in function 'run_cmd'. This can execute arbitrary code. Avoid using dangerous functions like exec/eval/os.system. Use safer alternatives. | Static | skills/wpank/session-handoff/scripts/create_handoff.py:32 | |
| MEDIUM | Arbitrary File Existence Check via Handoff 'project_path' and 'modified_files' The `check_staleness.py` script parses the `project_path` and `modified_files` from a user-provided handoff document. It then constructs file paths using `Path(project_path) / f` (where `f` is a modified file) and checks for their existence on the filesystem using `full_path.exists()`. An attacker can craft a handoff file with a malicious `project_path` (e.g., `/`) and `modified_files` (e.g., `etc/passwd`) to determine if arbitrary files exist on the system. This allows for information gathering and reconnaissance about the host environment. Restrict `project_path` and file references to be relative to the skill's execution directory or a known safe subdirectory. Validate `project_path` to ensure it does not contain path traversal sequences (`..`) or absolute paths outside the allowed scope. For `check_files_exist`, ensure `project_path` is validated to be within the expected project root and `f` is validated to be a relative path within that `project_path`. | LLM | scripts/check_staleness.py:150 | |
| MEDIUM | Arbitrary File Existence Check via Handoff File References The `validate_handoff.py` script extracts file paths from the content of a user-provided handoff document. It then constructs `full_path = Path(base_path) / filepath` and checks `full_path.exists()`. If an attacker crafts a handoff file with malicious file references (e.g., `../../../../etc/passwd` or `/etc/passwd`), they can determine the existence of arbitrary files on the system. This allows for information gathering and reconnaissance about the host environment. Restrict extracted file paths to be relative to the `base_path` (the directory of the handoff file) and validate them to prevent path traversal sequences (`..`) or absolute paths. Ensure that `filepath` does not escape the intended directory. | LLM | scripts/validate_handoff.py:160 |
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