CVE-2021-34435

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..

Weakness

The product does not properly verify that the source of data or communication is valid.

Affected Software

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/111.html
• https://cwe.mitre.org/data/definitions/141.html
• https://cwe.mitre.org/data/definitions/142.html
• https://cwe.mitre.org/data/definitions/160.html
• https://cwe.mitre.org/data/definitions/21.html
• https://cwe.mitre.org/data/definitions/384.html
• https://cwe.mitre.org/data/definitions/385.html
• https://cwe.mitre.org/data/definitions/386.html
• https://cwe.mitre.org/data/definitions/387.html
• https://cwe.mitre.org/data/definitions/388.html
• https://cwe.mitre.org/data/definitions/510.html
• https://cwe.mitre.org/data/definitions/59.html
• https://cwe.mitre.org/data/definitions/60.html
• https://cwe.mitre.org/data/definitions/75.html
• https://cwe.mitre.org/data/definitions/76.html
• https://cwe.mitre.org/data/definitions/89.html

References

• https://bugs.eclipse.org/bugs/show_bug.cgi?id=568018