Vesper MCP Server
vesper
PyPI
v0.4.14
Published by haroldmills — no publish provenance and no vendor-owned scope, so the publisher could not be verified. The repository link below is self-declared.
Every server starts at 100. These are the exact deductions the deterministic engine applied — each one reproducible, none of it an opinion or an LLM's guess:
| Points | What was found | Category |
|---|---|---|
| −27 | Dynamic evaluation of a non-literal value ×3 MTC-SRC-010 | injection |
| −9.5 | Unsafe deserialization ×2 MTC-SRC-007 | permissions |
Capability observations and info notes are shown under Findings but never scored.
Open any row's finding below for the file, line and evidence behind the deduction.
Findings 9
high Dynamic evaluation of a non-literal value (vesper/django/app/static/third-party/jasmine-3.10.1/jasmine.js)MTC-SRC-010
In the server's implementation (`vesper/django/app/static/third-party/jasmine-3.10.1/jasmine.js:3722`): Evaluating a runtime value as code (rather than a fixed literal) executes whatever reaches it — a direct RCE primitive, and almost never necessary in legitimate code. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: eval(
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server vesper/django/app/static/third-party/jasmine-3.10.1/jasmine.js
high Dynamic evaluation of a non-literal value (vesper/django/staticfiles/third-party/jasmine-3.10.1/jasmine.2063d12449ae.js)MTC-SRC-010
In the server's implementation (`vesper/django/staticfiles/third-party/jasmine-3.10.1/jasmine.2063d12449ae.js:3722`): Evaluating a runtime value as code (rather than a fixed literal) executes whatever reaches it — a direct RCE primitive, and almost never necessary in legitimate code. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: eval(
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server vesper/django/staticfiles/third-party/jasmine-3.10.1/jasmine.2063d12449ae.js
high Dynamic evaluation of a non-literal value (vesper/django/staticfiles/third-party/jasmine-3.10.1/jasmine.js)MTC-SRC-010
In the server's implementation (`vesper/django/staticfiles/third-party/jasmine-3.10.1/jasmine.js:3722`): Evaluating a runtime value as code (rather than a fixed literal) executes whatever reaches it — a direct RCE primitive, and almost never necessary in legitimate code. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: eval(
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server vesper/django/staticfiles/third-party/jasmine-3.10.1/jasmine.js
high Dynamic code execution in server code (vesper/django/app/static/third-party/jasmine-3.10.1/jasmine.js)MTC-SRC-001
In the server's implementation (`vesper/django/app/static/third-party/jasmine-3.10.1/jasmine.js:3722`): Evaluating strings as code is the most direct RCE primitive; if any tool input reaches it, the server executes attacker-chosen code. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: eval(
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server vesper/django/app/static/third-party/jasmine-3.10.1/jasmine.js
high Dynamic code execution in server code (vesper/django/staticfiles/third-party/jasmine-3.10.1/jasmine.2063d12449ae.js)MTC-SRC-001
In the server's implementation (`vesper/django/staticfiles/third-party/jasmine-3.10.1/jasmine.2063d12449ae.js:3722`): Evaluating strings as code is the most direct RCE primitive; if any tool input reaches it, the server executes attacker-chosen code. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: eval(
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server vesper/django/staticfiles/third-party/jasmine-3.10.1/jasmine.2063d12449ae.js
high Dynamic code execution in server code (vesper/django/staticfiles/third-party/jasmine-3.10.1/jasmine.js)MTC-SRC-001
In the server's implementation (`vesper/django/staticfiles/third-party/jasmine-3.10.1/jasmine.js:3722`): Evaluating strings as code is the most direct RCE primitive; if any tool input reaches it, the server executes attacker-chosen code. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: eval(
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server vesper/django/staticfiles/third-party/jasmine-3.10.1/jasmine.js
high Shell/command execution in server code (vesper/old_bird/old_bird_detector_runner.py)MTC-SRC-002
In the server's implementation (`vesper/old_bird/old_bird_detector_runner.py:288`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: subprocess.Popen(
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server vesper/old_bird/old_bird_detector_runner.py
medium Unsafe deserialization (vesper/command/execute_deferred_actions_command.py)MTC-SRC-007
In the server's implementation (`vesper/command/execute_deferred_actions_command.py:94`): Deserializing untrusted data with these APIs can execute arbitrary code (a well-known RCE gadget class). This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: pickle.load(
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server vesper/command/execute_deferred_actions_command.py
medium Unsafe deserialization (vesper/mpg_ranch/species_classifier.py)MTC-SRC-007
In the server's implementation (`vesper/mpg_ranch/species_classifier.py:60`): Deserializing untrusted data with these APIs can execute arbitrary code (a well-known RCE gadget class). This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: pickle.load(
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server vesper/mpg_ranch/species_classifier.py
What this scan could not see
- No tools were enumerated, so prompt-injection, capability and toxic-flow analysis had no tool surface to inspect. To grade a package’s real runtime tools, scan the running server: --command "npx -y <package>".
Versions
Scan history per published version. The engine is deterministic — the same version always yields the same score, so a changed score means the package itself changed.
| Version | Score | Findings | Engine | Scanned |
|---|---|---|---|---|
v0.4.14 latest |
D 64/100 | 9 | 1.5.0 | 2026-07-23 |
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Verify this score yourself
The score above is reproducible: the same package version always yields the same result. Run it locally or over the free API — no account, no LLM, fully deterministic.
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