GHSA-7m47-r75r-cx8v
MEDIUMContao applies improper access control in the back end voters
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Blast Radius
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
Impact
The table access voter in the back end doesn't check if a user is allowed to access the corresponding module.
Patches
Update to Contao 5.3.38 or 5.6.1.
Workarounds
Do not rely solely on the voter and additionally check USER_CAN_ACCESS_MODULE.
For more information
If you have any questions or comments about this advisory, open an issue in contao/contao.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | contao/core-bundle | ≥ 5.0.0&&< 5.3.38 | 5.3.38 |
| 🐘Packagist | contao/core-bundle | ≥ 5.4.0-RC1&&< 5.6.1 | 5.6.1 |
| 🐘Packagist | contao/contao | ≥ 5.0.0&&< 5.3.38 | 5.3.38 |
| 🐘Packagist | contao/contao | ≥ 5.4.0-RC1&&< 5.6.1 | 5.6.1 |
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 5.3.38 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-7m47-r75r-cx8v 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-7m47-r75r-cx8v 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-7m47-r75r-cx8v. 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-7m47-r75r-cx8v in your dependencies?
O3 detects GHSA-7m47-r75r-cx8v across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.