Description
In Eclipse Theia versions up to and including 0.16.0, in the notification messages there is no HTML escaping, so Javascript code can run.
Remediation
References
https://github.com/eclipse-theia/theia/issues/7283
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CVE-2020-8131 Vulnerability in maven package org.webjars.npm:yarn
CVE-2020-11023 Vulnerability in maven package org.webjars.npm:jquery