openstem-mcp@0.4.0
CAUTION· not startedPublisher claims: "이공계 학습용 MCP 서버: 학술 그림 렌더링, 풀이 검산, 문서 내보내기" Observed in sandbox: no network, touches nothing outside the project, writes no memory.
Registry PyPI (MCP server)Publisher kimi94279-glitch · publishing for 11 daysInstalls 0Last detonated 14 h ago
Coverage
Not started: dependency install failed; the server itself was not observed.- Tested
- the dependency install step · every file read, file written and host contacted by what ran
- Not tested
- server startup · the tool list · tool behavior
What this means for the label: Caution here covers what ran. The server's tools were not exercised with a real credential, so nothing about their behavior is asserted; the credential summary below says what to do with that.
Before you give it your token
- It will ask for
- no credential variables read in the code
- Where it talks to
- no vendor host named in the codeAlso fullyjustified.net, knu.ac.kr, astral.sh, snu.ac.kr, learnus.org, korea.ac.kr, skku.edu, hanyang.ac.kr, sogang.ac.kr, cau.ac.kr, khu.ac.kr, hufs.ac.kr, uos.ac.kr, ewha.ac.kr, konkuk.ac.kr, dongguk.edu, hongik.ac.kr, kookmin.ac.kr, ssu.ac.kr, sejong.ac.kr, ajou.ac.kr, inha.ac.kr, kw.ac.kr, mju.ac.kr, sookmyung.ac.kr, catholic.ac.kr, smu.ac.kr, kaist.ac.kr, postech.ac.kr, unist.ac.kr — not the publisher's domain; check what for before connecting.
- What the honeypot saw
- no credential files read · no network
- What we could not test
- server startup · the tool list · tool behavior
Connect it under the guard. Not started: dependency install failed; the server itself was not observed. The code names no credential variable; the guard pins the network to what the honeypot saw and logs every call.
$vet-skills run --net declared -- uvx openstem-mcp
Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.
Is [email protected] safe to install?
KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios; not started: dependency install failed; the server itself was not observed) on 2026-11-13 and scored it 65/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Hidden zero-width characters detected; Credential pass-through configuration; Tunneling service URL. Summary: no network, touches nothing outside the project, writes no memory.
Behavior trace
Honeypot run · 0 s · 2 scenarios · 0 deviationst+CategoryObserved action
0.0sprocessno install scripts in bundle
0.2sprocessdependency install exit 1 ·
0.2sclaimednot started: dependency install failed (exit 1); the server itself was not observed
0.2sprocessscript backend runs setup only
0.2sprocessno install scripts to re-run
Static findings
MEDIUM
Python subprocess execution detectedscripts/build_mcpb.py:137 · Python subprocess execution detected
AST05res = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.MEDIUM
Python subprocess execution detectedsrc/openstem/remote.py:324 · Python subprocess execution detected
AST05self.proc = subprocess.Popen(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.HIGH
Hidden zero-width characters detectedsrc/openstem/lms/client.py:703 · Hidden zero-width characters detected — may conceal content
AST07text = body.decode("utf-8", errors="replace").lstrip("").strip()Fix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.MEDIUM
Python subprocess execution detectedsrc/openstem/workers/documents.py:450 · Python subprocess execution detected
AST05res = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.MEDIUM
MCP server using network transport (SSE/HTTP)src/openstem/remote.py:161 · MCP server using network transport (SSE/HTTP) — data sent over network
AST04"""MCPServer의 streamable HTTP 앱을 비밀 키 검사로 감싼다."""Fix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.MEDIUM
Python subprocess execution detectedtests/test_lms.py:904 · Python subprocess execution detected
AST05proc = subprocess.run([sys.executable, str(script), str(Path(__file__).parent)], capture_output=True, check=False,Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.HIGH
Credential pass-through configurationsrc/openstem/lms/logs.py:39 · Credential pass-through configuration — agent relays sensitive credentials
AST02passFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.MEDIUM
Python subprocess execution detectedsrc/openstem/render/refdocs.py:194 · Python subprocess execution detected
AST05subprocess.run([pandoc, "-o", str(out), "--print-default-data-file", name], capture_output=True, check=True)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.MEDIUM
Python subprocess execution detectedscripts/install_check.py:284 · Python subprocess execution detected
AST05proc = subprocess.run(doctor, env=env, capture_output=True, timeout=600)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.HIGH
Tunneling service URLsrc/openstem/remote.py:294 · Tunneling service URL — may route traffic to attacker infrastructure
AST07"""cloudflared 출력 한 줄에서 https://<임의>.trycloudflare.com 주소를 찾는다."""Fix: Replace encoded or assembled strings with plain literals and remove undeclared network calls.MEDIUM
File type combined with upload actionsrc/openstem/tools/plotdata.py:29 · File type combined with upload action — agent may exfiltrate local data files
AST07The data actually plotted is saved as source_path (.csv) and fits/inputs in record_path (.json); to redo the analysis later, read them.Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.MEDIUM
Bidirectional text override characters detectedtests/test_lms.py:472 · Bidirectional text override characters detected — may hide content direction
AST07assert safe_name("a\x00b.pdf") == "ab.pdf"Fix: Replace encoded or assembled strings with plain literals and remove undeclared network calls.HIGH
Tunneling service URLsrc/openstem/remote.py:59 · Tunneling service URL — may route traffic to attacker infrastructure
AST07_TUNNEL_URL_RE = re.compile(r"https://(?!api\.)[a-z0-9]+(?:-[a-z0-9]+)*\.trycloudflare\.com\b", re.IGNORECASE)Fix: Replace encoded or assembled strings with plain literals and remove undeclared network calls.HIGH
Access to sensitive file pathssrc/openstem/isolation.py:184 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files
AST05"/etc/fonts", "/etc/localtime", "/etc/timezone", "/etc/texmf", "/etc/passwd", "/etc/group",Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.MEDIUM
Python subprocess execution detectedsrc/openstem/sandbox.py:198 · Python subprocess execution detected
AST05proc = subprocess.Popen(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.MEDIUM
Python subprocess execution detectedscripts/install_check.py:82 · Python subprocess execution detected
AST05self.proc = subprocess.Popen(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.CRITICAL
Pipe-to-shell patternsrc/openstem/render/latex.py:29 · Pipe-to-shell pattern — downloads and immediately executes remote code
AST06- Linux: get tectonic with curl --proto '=https' --tlsv1.2 -fsSL https://drop-sh.fullyjustified.net | sh and put it on PATHFix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.MEDIUM
Python subprocess execution detectedsrc/openstem/sandbox.py:102 · Python subprocess execution detected
AST05proc = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.MEDIUM
Python subprocess execution detectedscripts/register_claude_desktop.py:25 · Python subprocess execution detected
AST05out = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.MEDIUM
Access to sensitive file pathstests/test_lms.py:261 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files
AST05assert "file id" in fail("download", course="101", item="../../etc/passwd")["errors"][0]Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.MEDIUM
URL with embedded credentialstests/test_lms.py:105 · URL with embedded credentials — may be phishing or credential leaking
AST07monkeypatch.setenv("OPENSTEM_LMS_URL", "https://user:[email protected]")Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.MEDIUM
npx invocation of non-well-known packagescripts/build_mcpb.py:133 · npx invocation of non-well-known package — may execute untrusted code
AST06npx = _npx()Fix: Pin versions and sources; vendor anything fetched at install time.MEDIUM
Remote installer piped to shellsrc/openstem/render/latex.py:29 · Remote installer piped to shell
AST07- Linux: get tectonic with curl --proto '=https' --tlsv1.2 -fsSL https://drop-sh.fullyjustified.net | sh and put it on PATHFix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.MEDIUM
Python subprocess execution detectedscripts/build_mcpb.py:123 · Python subprocess execution detected
AST05res = subprocess.run([uv, "lock", "--check"], check=False, cwd=repo, capture_output=True, text=True, errors="replace")Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.HIGH
Hidden zero-width characters detectedsrc/openstem/lms/ical.py:83 · Hidden zero-width characters detected — may conceal content
AST07text = data.decode("utf-8", errors="replace").lstrip("")Fix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.MEDIUM
File type combined with upload actionsrc/openstem/tools/plot.py:27 · File type combined with upload action — agent may exfiltrate local data files
AST07The call is saved in record_path (.json: inputs, parsed series, warnings); to redo or edit the plot later, read record_path.Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.Cost to the agent
Instructions loaded
≈564 tok
2 files · 81 in bundle
Tool list per prompt
≈0 tok
0 tools · 0 per tool
Handshake
no reply
launch to tools/list, stdio
Undocumented tools
0
description under 20 chars · avg 0
Tokens estimated at four characters each. The tool list is re-read by the agent on every turn, so it is the number to compare between servers that do the same job: ranked across the index.
Known vulnerabilities
No advisories in OSV for openstem-mcp@0.4.0 as of 14 h ago. This is the package itself, not its dependencies.
What would make this Verified
15 points to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%- Pipe-to-shell pattern≈ +9 on the totalBuild commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
- Unclaimed publisher≈ +8 on the totalClaim kimi94279-glitch: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
- Hidden zero-width characters detected≈ +4 on the totalKeep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
- Credential pass-through configuration≈ +4 on the totalStop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
- Tunneling service URL≈ +4 on the totalReplace encoded or assembled strings with plain literals and remove undeclared network calls.
- Access to sensitive file paths≈ +4 on the totalStop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
Publish a new version to PyPI, then queue it here. Not your skill? Claim the handle to get verdict changes by email.Claim kimi94279-glitchPropose a patch to the maintainer