How severe is CVE-2023-33831?

CVE-2023-33831 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2023-33831?

CVE-2023-33831 affects the following packages: @frangoteam/fuxa (npm). Ecosystems affected: npm.

How do I fix CVE-2023-33831?

No fixed version has been published for CVE-2023-33831 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2023-33831 actively exploited in the wild?

Yes. There are 4 known exploit references for CVE-2023-33831, including 3 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2023-33831?

CVE-2023-33831 has an EPSS (Exploit Prediction Scoring System) score of 93.4%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

What type of vulnerability is CVE-2023-33831?

CVE-2023-33831 is classified as CWE-77 (CWE-77). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Is there exploit tooling available for CVE-2023-33831?

A Nuclei detection template exists for CVE-2023-33831, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2023-33831 published, and has it been updated?

CVE-2023-33831 was published on September 18, 2023 and was last updated on March 14, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

CVE-2023-33831

CRITICAL

A remote command execution (RCE) vulnerability in the /api/runscript endpoint of FUXA

Also known asGHSA-r87q-fq37-pvr6

Published

Sep 18, 2023

Updated

Mar 14, 2026

Affected

1 pkg

Patched

None yet

Exploits

4 known

EPSS Exploitation Probability

via FIRST.org ↗

93.4%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

1 pkg affected

📦@frangoteam/fuxa

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects npm packages — download data is not available via public APIs for these ecosystems.

Description

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

1 total

Ecosystem	Package	Vulnerable range	Fix
📦npm	`@frangoteam/fuxa`	all versions	No fix

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

A remote command execution (RCE) vulnerability in the /api/runscript end…

github.comGithubSep 2023

A remote command execution (RCE) vulnerability in the /api/runscript end…

youtu.beNVDSep 2023

A remote command execution (RCE) vulnerability in the /api/runscript end…

github.comNVDSep 2023

Frequently Asked Questions

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.

O3 Security · Impact-Aware SCA

Is CVE-2023-33831 in your stack?

O3 detects CVE-2023-33831 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my stack How O3 SCA works