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CRITICAL severity

FeehiCMS has an arbitrary file upload vulnerabilityGHSA-jj62-mc3m-j769

CRITICALFix: liufee/cms@ecbfb0c

GHSA-jj62-mc3m-j769 is a critical-severity (CVSS 9.8) Unrestricted File Upload vulnerability in feehi/cms. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for feehi/cms — see the affected versions and patch details below.

Also known asCVE-2020-21516
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 ↗
1.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs70th percentile — riskier than 70% of all scored CVEsHighest risk
0.00%0.59%1.18%1.77%0.4%1.3%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
🐘feehi/cms

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

There is an arbitrary file upload vulnerability in FeehiCMS 2.0.8.1 at the head image upload, that allows attackers to execute relevant PHP code.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistfeehi/cmsall versions2.0.8.1composer require feehi/cms:^2.0.8.1

Affected Products

1 product · 1 configurations
Application
feehicmsfeehi
1 version
2.0.8
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.

There is an arbitrary file upload vulnerability in FeehiCMS 2.0.8 at the…

github.comNVDSep 2022

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update feehi/cms to 2.0.8.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-jj62-mc3m-j769 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

There is an arbitrary file upload vulnerability in FeehiCMS 2.0.8.1 at the head image upload, that allows attackers to execute relevant PHP code.
O3 Security · Impact-Aware SCA

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FeehiCMS has an arbitrary file upload vulnerability