GHSA-r5gm-4p5w-pq2p is a critical-severity (CVSS 9.8) Unrestricted File Upload vulnerability in verot/class.upload.php. 6 public exploit references exist, so weaponization risk is real. O3 Security confirms whether GHSA-r5gm-4p5w-pq2p is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Remote code execution in verot/class.upload.php
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 | 1.0.3 |
| 🐘Packagist | verot/class.upload.php | ≥ 2.0.0&&< 2.0.4 | 2.0.4 |
Research 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. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
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.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-r5gm-4p5w-pq2p is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-r5gm-4p5w-pq2p. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-r5gm-4p5w-pq2p in your dependencies?
O3 detects GHSA-r5gm-4p5w-pq2p across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.