CVE-2019-19745
HIGHCVE-2019-19745 is a high-severity (CVSS 8.8) Unrestricted File Upload vulnerability in contao/core-bundle. O3 Security confirms whether CVE-2019-19745 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Unrestricted file uploads in Contao
Real-World Exposure
contao/core-bundle🐘contao/core-bundle🐘contao/contao🐘contao/contaoReal-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
Contao 4.0 through 4.8.5 allows PHP local file inclusion. A back end user with access to the form generator can upload arbitrary files and execute them on the server.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | contao/core-bundle | ≥ 4.0.0&&< 4.4.46 | 4.4.46 |
| 🐘Packagist | contao/core-bundle | ≥ 4.5.0&&< 4.8.6 | 4.8.6 |
| 🐘Packagist | contao/contao | ≥ 4.0.0&&< 4.4.46 | 4.4.46 |
| 🐘Packagist | contao/contao | ≥ 4.5.0&&< 4.8.6 | 4.8.6 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for contao/core-bundle. 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 contao/core-bundle to 4.4.46 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-19745 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 CVE-2019-19745 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 CVE-2019-19745. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2019-19745 in your dependencies?
O3 detects CVE-2019-19745 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.