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Not in CISA KEV
HIGH severity

Yii Framework reflected Cross-site ScriptingGHSA-8gfq-c54m-3rf6

HIGHFix: yiisoft/yii2#15534

GHSA-8gfq-c54m-3rf6 is a high-severity (CVSS 7.5) Cross-site Scripting (XSS) vulnerability in yiisoft/yii2. A fix is available for yiisoft/yii2 — see the affected versions and patch details below.

Also known asCVE-2018-6010
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
2.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs87th percentile — riskier than 87% of all scored CVEsHighest risk
0.44%1.46%2.47%3.48%1.0%2.9%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘yiisoft/yii2

Real-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

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistyiisoft/yii2≥ 2.0.0&&< 2.0.142.0.14composer require yiisoft/yii2:^2.0.14

Affected Products

1 product · 20 configurations
Application
yiiframeworkyiiframework
17 versions
2.0.02.0.12.0.22.0.32.0.42.0.52.0.62.0.72.0.82.0.92.0.102.0.11

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for yiisoft/yii2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update yiisoft/yii2 to 2.0.14 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-8gfq-c54m-3rf6 is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

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Yii Framework reflected Cross-site Scripting (High 7.5)