CVE-2018-6010
HIGHCVE-2018-6010 is a high-severity (CVSS 7.5) Cross-site Scripting (XSS) vulnerability in yiisoft/yii2. O3 Security confirms whether CVE-2018-6010 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Yii Framework reflected Cross-site Scripting
Blast Radius
yiisoft/yii2Real-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 Yii Framework 2.x before 2.0.14, remote attackers could obtain potentially sensitive information from exception messages, or exploit reflected XSS on the error handler page in non-debug mode. Related to base/ErrorHandler.php, log/Dispatcher.php, and views/errorHandler/exception.php.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | yiisoft/yii2 | ≥ 2.0.0&&< 2.0.14 | 2.0.14 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for yiisoft/yii2. 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 yiisoft/yii2 to 2.0.14 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-6010 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-2018-6010 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-2018-6010. 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-2018-6010 in your dependencies?
O3 detects CVE-2018-6010 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.