Remote code execution in Eclipse Theia

Description

In Eclipse Theia 0.3.9 to 1.8.1, the “mini-browser” extension allows a user to preview HTML files in an iframe inside the IDE. But with the way it is made it is possible for a previewed HTML file to trigger an RCE. This exploit only happens if a user previews a malicious file.

Recommendation

Update the @theia/mini-browser package to the latest compatible version. Followings are version details:

• Affected version(s): >= 0.3.9, < 1.9.0
• Patched version(s): 1.9.0

References

• GHSA-v9w2-v7j9-rjpr
• bugs.eclipse.org
• CVE-2021-34435
• CWE-346
• CWE-668
• CWE-942
• CAPEC-310
• OWASP 2021-A1
• OWASP 2021-A5
• OWASP 2021-A6
• OWASP 2021-A7

Related Issues

• Angular Expressions - Remote Code Execution - CVE-2021-21277
• Remote code execution via the `pretty` option. - CVE-2021-21353
• angular-base64-upload vulnerable to unauthenticated remote code execution - CVE-2024-42640
• DocsGPT Allows Remote Code Execution - CVE-2025-0868

Tags:

npm

@theia/mini-browser