CVEvulnerability

CVE-2021-34435

8.8 HIGH Published 2021-09-01 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-09-01
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
Weaknesses
CWE-346, CWE-942

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..

Affected configurations

• eclipse theia (>= 0.3.9 <= 1.8.1)

Related

Weakness · CWE (2)

  • CWE-346 Origin Validation Error weakness
  • CWE-942 Permissive Cross-domain Security Policy with Untrusted Domains weakness

References