Medium

Improper Verification of Communication Channel in @theia/plugin-ext

  • Disclosed: 15.11.2021
  • Updated: 11.10.2026 10:22

In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().

Affected software

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PlatformPackageVulnerable versionsFixed in
npm package @theia/plugin-ext < 1.18.0 1.18.0

References

CVSS score 6.1/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE)
CWE-940
Platform
npm
Package
@theia/plugin-ext
Disclosed
15.11.2021
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-w6v7-w58j-pg5r - CC BY 4.0

Vulnerability history: @theia/plugin-ext

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

This is the only known vulnerability of this package.

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