CVE-2019-19576 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.
Remote code execution in verot/class.upload.php
EPSS Exploitation Probability
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
verot/class.upload.php🐘verot/class.upload.phpReal-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
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | verot/class.upload.php | all versions | 1.0.3composer require verot/class.upload.php:^1.0.3 |
| 🐘Packagist | verot/class.upload.php | ≥ 2.0.0&&< 2.0.4 | 2.0.4composer require verot/class.upload.php:^2.0.4 |
Affected Products
k2joomlaworksverotverot_projectResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Verot 2.0.3 - Remote Code Execution
by Jinny Ramsmark · Dec 6, 2019
Detection & mitigation playbook
Open-source dependencyDetect
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.
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 CVE-2019-19576 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.
Frequently Asked Questions
Is CVE-2019-19576 in your dependencies?
Find it across Packagist, including transitive dependencies.