How severe is CVE-2018-9206?

CVE-2018-9206 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2018-9206?

CVE-2018-9206 affects the following packages: blueimp-file-upload (npm). Ecosystems affected: npm.

How do I fix CVE-2018-9206?

Update blueimp-file-upload to 9.22.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-9206 is resolved across your whole dependency graph.

How do I detect CVE-2018-9206 in my npm dependencies?

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

How do I mitigate CVE-2018-9206 if there is no patch (or I can't update yet)?

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.

Is CVE-2018-9206 actively exploited in the wild?

Yes. There are 17 known exploit references for CVE-2018-9206, including 3 documented proof-of-concept exploits on Exploit-DB and 11 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-2018-9206?

CVE-2018-9206 has an EPSS (Exploit Prediction Scoring System) score of 97.3%, 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-2018-9206?

CVE-2018-9206 is classified as Unrestricted File Upload (CWE-434). 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-2018-9206?

A Nuclei detection template exists for CVE-2018-9206, 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-2018-9206 published, and has it been updated?

CVE-2018-9206 was published on October 11, 2018 and was last updated on October 20, 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

Not in CISA KEV

CRITICAL severity

CVE-2018-9206 — blueimp-file-upload

CRITICAL

CVE-2018-9206 is a critical-severity (CVSS 9.8) Unrestricted File Upload vulnerability in blueimp-file-upload. 17 public exploit references exist, so weaponization risk is real. A fix is available for blueimp-file-upload — see the affected versions and patch details below.

Unrestricted Upload of File with Dangerous Type in blueimp-file-upload

Also known asGHSA-4cj8-g9cp-v5wr

Published

Oct 11, 2018

Updated

Oct 20, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

17 known

Exploitation data as of Oct 19, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

97.3%probability of exploitation in next 30 days

Very High Risk+0.15%

Lower risk than most CVEs100th percentile — riskier than 100% of all scored CVEsHighest risk

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

How urgent is this, really

CVE-2018-9206 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).

Where this sits among everything scored

Of 394,415 CVEs with a current EPSS score, this one falls in the ≥ 90% 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.

50other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

blueimp-file-uploadnpm

49Kdownloads / week

Description

Unauthenticated arbitrary file upload vulnerability in Blueimp jQuery-File-Upload <= v9.22.0

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`blueimp-file-upload`	all versions	9.22.1`npm install blueimp-file-upload@9.22.1`

Affected Products

1 product · 1 configurations

Application

jquery file uploadjquery_file_upload_project

≤ 9.22.0

range

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.

EDB-45790remotephp✓ Verified

blueimp's jQuery 9.22.0 - (Arbitrary) File Upload (Metasploit)

by Metasploit · Nov 6, 2018

Exploit-DB Source

EDB-46182webappsphp

Blueimp's jQuery File Upload 9.22.0 - Arbitrary File Upload Exploit

by Larry W. Cashdollar · Jan 16, 2019

Exploit-DB Source

EDB-45584webappsphp✓ Verified

jQuery-File-Upload 9.22.0 - Arbitrary File Upload

by Larry W. Cashdollar · Oct 11, 2018

Exploit-DB Source

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for blueimp-file-upload, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update blueimp-file-upload to 9.22.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-9206 is resolved across your whole dependency graph.
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.

How to detect CVE-2018-9206

A community-maintained Nuclei template exists for this CVE. You can scan for it directly:

nuclei -id cve-2018-9206 -u https://target

Template: Blueimp jQuery-File-Upload v9.22.0 - Unrestricted File Upload
Severity: critical
Impact: Attackers can upload malicious files, potentially leading to remote code execution or server compromise.
Remediation: Update to the latest version of Blueimp jQuery-File-Upload.

Template by ProjectDiscovery nuclei-templates (thewindghost), MIT licensed. View the full template. Scan only systems you are authorised to test.

Frequently Asked Questions

Unauthenticated arbitrary file upload vulnerability in Blueimp jQuery-File-Upload <= v9.22.0

O3 Security · Impact-Aware SCA

Is CVE-2018-9206 in your dependencies?

Find it across npm, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

9.8/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE Classification

CWE-434Unrestricted File Upload

Weaponization

OpenSSF Scorecard

Package health score

RichFilemanager

2.2/10

Code-Review5/10

Maintained0/10

Branch-Protection0/10

Assessed Oct 12, 2026

Timeline

Disclosed

Oct 11, 2018

First exploit

Nov 6, 2018

Last updated

Oct 20, 2026

Identifiers

CVE-2018-9206

GHSA-4cj8-g9cp-v5wr

References

Advisorysecurityfocus.com Advisorysecurityfocus.com Advisorynvd.nist.gov Advisorygithub.com Fixoracle.com Reportgithub.com Reportgithub.com Webexploit-db.com Webexploit-db.com Evidencevapidlabs.com Evidencewpvulndb.com Evidenceexploit-db.com Evidenceexploit-db.com

Related vulnerabilities

This CVE is critical severity; 1 of 8 other CVEs with CWE-434 is rated as high or higher (top: critical).

CVE-2026-105862CVE-2026-105651CVE-2026-105649CVE-2026-105868CVE-2026-105679CVE-2026-105644CVE-2026-104890GHSA-v2f8-6655-7grjBrowse all CWE-434

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 20, 2026

CVE-2018-9206 — blueimp-file-upload

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

How to detect CVE-2018-9206

Frequently Asked Questions

Is CVE-2018-9206 in your dependencies?