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CRITICAL severity

CVE-2017-20160 — express-param

CRITICALFix: flitto/express-param@db94f73

CVE-2017-20160 is a critical-severity (CVSS 9.8) CWE-235 vulnerability in express-param. A fix is available for express-param — see the affected versions and patch details below.

express-param vulnerable to Improper Handling of Extra Parameters

Also known asGHSA-fr54-72wr-cqvq
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs59th percentile — riskier than 59% of all scored CVEsHighest risk
0.07%0.51%0.95%1.38%0.6%0.9%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.

0other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
express-paramnpm
37downloads / week

Description

A vulnerability was found in flitto express-param up to 0.x. It has been classified as critical. This affects an unknown part of the file lib/fetchParams.js. The manipulation leads to improper handling of extra parameters. It is possible to initiate the attack remotely. Upgrading to version 1.0.0 is able to address this issue. The identifier of the patch is db94f7391ad0a16dcfcba8b9be1af385b25c42db. It is recommended to upgrade the affected component. The identifier VDB-217149 was assigned to this vulnerability.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmexpress-paramall versions1.0.0npm install express-param@1.0.0

Affected Products

1 product · 1 configurations
Application
express-paramflitto
< 1.0.0
range

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-param, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update express-param to 1.0.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2017-20160 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

A vulnerability was found in flitto express-param up to 0.x. It has been classified as critical. This affects an unknown part of the file lib/fetchParams.js. The manipulation leads to improper handling of extra parameters. It is possible to initiate the attack remotely. Upgrading to version 1.0.0 is able to address this issue. The identifier of the patch is db94f7391ad0a16dcfcba8b9be1af385b25c42db. It is recommended to upgrade the affected component. The identifier VDB-217149 was assigned to this vulnerability.
O3 Security · Impact-Aware SCA

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CVE-2017-20160: express-param — Fixed in 1.0.0