CVE-2019-16768 is a medium-severity (CVSS 4.3) CWE-209 vulnerability in sylius/sylius. O3 Security confirms whether CVE-2019-16768 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Internal exception message exposure for login action in Sylius
Real-World Exposure
sylius/sylius🐘sylius/sylius🐘sylius/sylius🐘sylius/syliusReal-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
In affected versions of Sylius, exception messages from internal exceptions (like database exception) are wrapped by \Symfony\Component\Security\Core\Exception\AuthenticationServiceException and propagated through the system to UI. Therefore, some internal system information may leak and be visible to the customer. A validation message with the exception details will be presented to the user when one will try to log into the shop. This has been patched in versions 1.3.14, 1.4.10, 1.5.7, and 1.6.3.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | sylius/sylius | all versions | 1.3.14 |
| 🐘Packagist | sylius/sylius | ≥ 1.4.0&&< 1.4.10 | 1.4.10 |
| 🐘Packagist | sylius/sylius | ≥ 1.5.0&&< 1.5.7 | 1.5.7 |
| 🐘Packagist | sylius/sylius | ≥ 1.6.0&&< 1.6.3 | 1.6.3 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for sylius/sylius. 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 sylius/sylius to 1.3.14 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-16768 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-2019-16768 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-2019-16768. 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-2019-16768 in your dependencies?
O3 detects CVE-2019-16768 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.