CVE-2021-34435 is a vulnerability in Eclipse Theia
Published on September 1, 2021
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 Type
Permissive Cross-domain Policy with Untrusted Domains
The software uses a cross-domain policy file that includes domains that should not be trusted.
Products Associated with CVE-2021-34435
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Affected Versions
The Eclipse Foundation Eclipse Theia:- Version 0.3.9 and below unspecified is affected.
- Version unspecified, <= 1.8.1 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.