CVE-2019-10641 is a critical-severity (CVSS 9.8) CWE-640 vulnerability in contao/contao. A fix is available for contao/contao — see the affected versions and patch details below.
Contao Does Not Invalidate Existing Sessions When Password Changes
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.
How urgent is this, really
CVE-2019-10641 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,636 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
contao/contao🐘contao/contao🐘contao/core-bundle🐘contao/core-bundle🐘contao/coreReal-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
Security researcher Ali Razzaq has discovered that existing sessions are not correctly invalidated when a user changes their password in the backend or frontend.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | contao/contao | ≥ 4.0.0&&< 4.4.37 | 4.4.37composer require contao/contao:^4.4.37 |
| 🐘Packagist | contao/contao | ≥ 4.5.0&&< 4.7.3 | 4.7.3composer require contao/contao:^4.7.3 |
| 🐘Packagist | contao/core-bundle | ≥ 4.0.0&&< 4.4.37 | 4.4.37composer require contao/core-bundle:^4.4.37 |
| 🐘Packagist | contao/core-bundle | ≥ 4.5.0&&< 4.7.3 | 4.7.3composer require contao/core-bundle:^4.7.3 |
| 🐘Packagist | contao/core | ≥ 3.0.0&&< 3.5.39 | 3.5.39composer require contao/core:^3.5.39 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for contao/contao, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update contao/contao to 4.4.37 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-10641 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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2019-10641 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2019-10641. 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-2019-10641 in your dependencies?
O3 Security finds CVE-2019-10641 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.