CVE-2019-18213: XML Language Server (aka lsp4xml) before 0.9.1, as used in Red Hat XML Language Support (aka vscode-xml) befor

Q: How do I fix CVE-2019-18213?

xml server project: upgrade to 0.9.1; wild web developer: mitigate or apply the listed mitigation; theia xml extension: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2019-18213 being exploited?

CVE-2019-18213 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-18213 affect?

CVE-2019-18213 affects xml server project, wild web developer, theia xml extension. Severity is high (CVSS 8.8). 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 connectio

Q: How urgent is CVE-2019-18213?

Priority 56/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADEMITIGATEMITIGATE

CVE-2019-18213 is a high-severity flaw (CVSS 8.8) affecting xml server project, wild web developer, theia xml extension. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	2.0% (top 19%)
CISA exploited list	No
Weakness	CWE-611
Published	2019-10-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: eclipse · theia xml extension project · xml language server project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-10-23 22:15 UTCPublished CVE record published
2026-06-17 02:24 UTCUpdated Record last modified

xml language server project xml server project UPGRADE

Affected: < 0.9.1

Fixed in: 0.9.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy xml-server-project || rpm -q xml-server-project || xml-server-project --version

2. UPGRADE to 0.9.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade xml-server-project

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade xml-server-project

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

eclipse wild web developer MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy wild-web-developer || rpm -q wild-web-developer || wild-web-developer --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

theia xml extension project theia xml extension MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy theia-xml-extension || rpm -q theia-xml-extension || theia-xml-extension --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-18213?

xml server project: upgrade to 0.9.1; wild web developer: mitigate or apply the listed mitigation; theia xml extension: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-18213 being exploited?

CVE-2019-18213 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-18213 affect?

CVE-2019-18213 affects xml server project, wild web developer, theia xml extension. Severity is high (CVSS 8.8). 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 connectio

How urgent is CVE-2019-18213?

Priority 56/100. High severity; Public exploit reference

Software pages

Java vulnerabilities · Visual Studio vulnerabilities

Related CVEs

CVE-2019-18212 MEDIUM 6.5 UPGRADE MITIGATE XMLLanguageService.java in XML Language Server (aka lsp4xml) before 0.9.1, as used in Red Hat XML Language Sup

References

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