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CRITICAL severity

CVE-2018-9209 — php-traditional-server

CRITICAL

CVE-2018-9209 is a critical-severity (CVSS 9.8) Unrestricted File Upload vulnerability in fineuploader/php-traditional-server. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

FineUploader php-traditional-server unauthenticated arbitrary file upload vulnerability

Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs79th percentile — riskier than 79% of all scored CVEsHighest risk
0.99%1.44%1.89%2.34%1.5%1.8%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
🐘fineuploader/php-traditional-server

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Unauthenticated arbitrary file upload vulnerability in FineUploader php-traditional-server <= v1.2.2

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐘Packagistfineuploader/php-traditional-serverall versionsNo fix

Affected Products

1 product · 1 configurations
Application
php-traditional-serverfineuploader
≤ 1.2.2
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.

Unauthenticated arbitrary file upload vulnerability in FineUploader php-…

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 fineuploader/php-traditional-server, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of fineuploader/php-traditional-server for CVE-2018-9209. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    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

Unauthenticated arbitrary file upload vulnerability in FineUploader php-traditional-server <= v1.2.2
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CVE-2018-9209: php-traditional-server (Critical 9.8)