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Unrestricted Upload of File with Dangerous Type in jquery-file-uploadGHSA-mxr5-p36v-479m

CRITICAL

GHSA-mxr5-p36v-479m is a critical-severity (CVSS 9.8) Unrestricted File Upload vulnerability in jquery-file-upload. 1 public exploit reference exists, so weaponization risk is real. A fix is available for jquery-file-upload — see the affected versions and patch details below.

Also known asCVE-2018-9207
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
3.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs89th percentile — riskier than 89% of all scored CVEsHighest risk
0.00%12.0%24.1%36.1%28.6%3.5%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

GHSA-mxr5-p36v-479m by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

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.

2other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
jquery-file-uploadnpm
1Kdownloads / week

Description

Arbitrary file upload in jQuery Upload File <= 4.0.2

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmjquery-file-uploadall versions4.0.5npm install jquery-file-upload@4.0.5

Affected Products

1 product · 1 configurations
Application
jquery upload filehayageek
≤ 4.0.2
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.

Arbitrary file upload in jQuery Upload File <= 4.0.2

vapidlabs.comNVDDec 2018

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update jquery-file-upload to 4.0.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-mxr5-p36v-479m is resolved across your whole dependency graph.

  3. Workarounds

    Treat uploaded files as untrusted until proven otherwise: validate the actual content type rather than the supplied extension, store uploads outside the web root on a volume mounted without execute permission, and rename them to server-generated identifiers so an attacker cannot choose the path a request will later resolve.

Frequently Asked Questions

Arbitrary file upload in jQuery Upload File <= 4.0.2
O3 Security · Impact-Aware SCA

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