CVE-2019-18213

Name: CVE-2019-18213
Creator: NVD / NIST
Published: 2019-10-23T22:15:10.943+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.98%

Last modified Jun 17, 2026

CVE-2019-18213 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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 XXE via a crafted XML document, with resultant SSRF (as well as SMB connection initiation that can lead to NetNTLM challenge/response capture for password cracking). This occurs in extensions/contentmodel/participants/diagnostics/LSPXMLParserConfiguration.java.. EPSS estimates a 1.98% chance of exploitation in the next 30 days.

Description

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 XXE via a crafted XML document, with resultant SSRF (as well as SMB connection initiation that can lead to NetNTLM challenge/response capture for password cracking). This occurs in extensions/contentmodel/participants/diagnostics/LSPXMLParserConfiguration.java.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.98%

78.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-611

Affected Software

Vendor	Product	Versions
Xml Language Server Project	Xml Server Project	< 0.9.1
Eclipse	Wild Web Developer	All versions
Theia Xml Extension Project	Theia Xml Extension	All versions

References

https://github.com/angelozerr/lsp4xml/Product
https://github.com/angelozerr/lsp4xml/blob/master/CHANGELOG.md#othersRelease Notes, Third Party Advisory
https://github.com/angelozerr/lsp4xml/pull/566Patch, Third Party Advisory
https://github.com/redhat-developer/vscode-xml/Patch, Third Party Advisory
https://marketplace.visualstudio.com/items?itemName=redhat.vscode-xmlThird Party Advisory
https://www.shielder.it/blog/dont-open-that-xml-xxe-to-rce-in-xml-plugins-for-vs-code-eclipse-theia/Exploit, Third Party Advisory
https://github.com/angelozerr/lsp4xml/Product
https://github.com/angelozerr/lsp4xml/blob/master/CHANGELOG.md#othersRelease Notes, Third Party Advisory
https://github.com/angelozerr/lsp4xml/pull/566Patch, Third Party Advisory
https://github.com/redhat-developer/vscode-xml/Patch, Third Party Advisory
https://marketplace.visualstudio.com/items?itemName=redhat.vscode-xmlThird Party Advisory
https://www.shielder.it/blog/dont-open-that-xml-xxe-to-rce-in-xml-plugins-for-vs-code-eclipse-theia/Exploit, Third Party Advisory

Timeline

Published: Oct 23, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-18213?

How severe is CVE-2019-18213?

CVE-2019-18213 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.98% probability of exploitation in the next 30 days.

How do I fix CVE-2019-18213?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-18213?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST