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Not in CISA KEV
HIGH severity

CVE-2018-16483 — express-cart

HIGH

CVE-2018-16483 is a high-severity (CVSS 8.8) CWE-290 vulnerability in express-cart. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for express-cart — see the affected versions and patch details below.

Authentication Bypass by Spoofing in express-cart

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs67th percentile — riskier than 67% of all scored CVEsHighest risk
0.00%0.55%1.10%1.66%0.2%1.2%May 26Sep 26Nov 26

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

1 pkg affected

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.

1other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
express-cartnpm
194downloads / week

Description

A deficiency in the access control in module express-cart <=1.1.5 allows unprivileged users to add new users to the application as administrators.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmexpress-cartall versions1.1.6npm install express-cart@1.1.6

Affected Products

1 product · 1 configurations
Application
express-cartexpress-cart_project
≤ 1.1.5
range
Exploits & PoCs
1

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

A deficiency in the access control in module express-cart <=1.1.5 allows…

hackerone.comNVDAug 2020

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for express-cart, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update express-cart to 1.1.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-16483 is resolved across your whole dependency graph.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

A deficiency in the access control in module express-cart <=1.1.5 allows unprivileged users to add new users to the application as administrators.
O3 Security · Impact-Aware SCA

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CVE-2018-16483: express-cart — Fixed in 1.1.6