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CRITICAL severity

Remote code execution in verot/class.upload.phpGHSA-r5gm-4p5w-pq2p

CRITICALFix: getk2/k2@d134470

GHSA-r5gm-4p5w-pq2p is a critical-severity (CVSS 9.8) Unrestricted File Upload vulnerability in verot/class.upload.php. 6 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for verot/class.upload.php — see the affected versions and patch details below.

Also known asCVE-2019-19576
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
6 known
Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
26.4%probability of exploitation in next 30 days
Moderate Risk0.00%
Lower risk than most CVEs98th percentile — riskier than 98% of all scored CVEsHighest risk
18.9%31.9%44.9%57.9%50.6%26.4%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

2 pkgs affected
🐘verot/class.upload.php🐘verot/class.upload.php

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

class.upload.php in verot.net class.upload before 1.0.3 and 2.x before 2.0.4, as used in the K2 extension for Joomla! and other products, omits .phar from the set of dangerous file extensions.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistverot/class.upload.phpall versions1.0.3composer require verot/class.upload.php:^1.0.3
🐘Packagistverot/class.upload.php≥ 2.0.0&&< 2.0.42.0.4composer require verot/class.upload.php:^2.0.4

Affected Products

2 products · 3 configurations
Application
k2joomlaworks
≤ 2.10.1
range
Application
verotverot_project
≥ 2.0.0 && < 2.0.4
range
Exploits & PoCs
6

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-47749webappsphp

Verot 2.0.3 - Remote Code Execution

by Jinny Ramsmark · Dec 6, 2019

Exploit-DB Source

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update verot/class.upload.php to 1.0.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-r5gm-4p5w-pq2p 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

class.upload.php in verot.net class.upload before 1.0.3 and 2.x before 2.0.4, as used in the K2 extension for Joomla! and other products, omits .phar from the set of dangerous file extensions.
O3 Security · Impact-Aware SCA

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Remote code execution in verot/class.upload.php