CVE-2023-33831 — @frangoteam/fuxa
CRITICALCVE-2023-33831 is a critical-severity (CVSS 9.8) CWE-77 vulnerability in @frangoteam/fuxa. 4 public exploit or proof-of-concept references are indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.
A remote command execution (RCE) vulnerability in the /api/runscript endpoint of FUXA
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- A successful exploit gives an attacker total control of the affected component, not partial access.
Exploitation and automatability from CISA’s SSVC triage for CVE-2023-33831.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
@frangoteam/fuxanpmDescription
A remote command execution (RCE) vulnerability in the /api/runscript endpoint of FUXA 1.1.13 allows attackers to execute arbitrary commands via a crafted POST request.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | @frangoteam/fuxa | all versions | No fix |
Affected Products
fuxafrangoteamResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for @frangoteam/fuxa, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
The records we use list no patched version of @frangoteam/fuxa for CVE-2023-33831. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.
Mitigate without a patch
Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does.
How to detect CVE-2023-33831
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id cve-2023-33831 -u https://target- Template
- FUXA - Unauthenticated Remote Code Execution
- Severity
- critical
- Impact
- Unauthenticated attackers can execute arbitrary Node.js code through the runscript API endpoint, potentially compromising the entire SCADA/HMI system and accessing industrial control data.
- Remediation
- Update FUXA to a version newer than 1.1.13 that validates script code and requires authentication for the runscript endpoint.
Template by ProjectDiscovery nuclei-templates (gy741), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is CVE-2023-33831 in your dependencies?
Find it across npm, including transitive dependencies.