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CRITICAL severity

CVE-2017-1000228 — ejs

CRITICAL

CVE-2017-1000228 is a critical-severity (CVSS 9.8) Improper Input Validation vulnerability in ejs. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for ejs — see the affected versions and patch details below.

ejs is vulnerable to remote code execution due to weak input validation

Also known asGHSA-3w5v-p54c-f74x
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Nov 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
6.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs94th percentile — riskier than 94% of all scored CVEsHighest risk
5.83%6.45%7.06%7.68%7.2%6.4%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.

16Kother npm packages depend on this — each one inherits the vulnerability until it's patched upstream
ejsnpm
59.6Mdownloads / week

Description

nodejs ejs versions older than 2.5.3 is vulnerable to remote code execution due to weak input validation in ejs.renderFile() function

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmejsall versions2.5.5npm install ejs@2.5.5

Affected Products

1 product · 1 configurations
Application
ejsejs
< 2.5.3
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.

nodejs ejs versions older than 2.5.3 is vulnerable to remote code execut…

snyk.ioNVDNov 2017

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update ejs to 2.5.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2017-1000228 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

nodejs ejs versions older than 2.5.3 is vulnerable to remote code execution due to weak input validation in ejs.renderFile() function
O3 Security · Impact-Aware SCA

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CVE-2017-1000228: ejs RCE — Fixed in 2.5.5