Home
» GitHub Advisories
» GHSA-v9w2-v7j9-rjpr
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.
Basic information
Type
reviewed
Severity
high Advisory on GitHub
Open advisory ↗ Repository advisory
—
Source code
Browse source ↗ Published (advisory)
2021-09-02 22:02:36 UTC
Updated
2023-01-29 05:07:50 UTC
GitHub reviewed
2021-09-02 17:12:13 UTC
NVD published
2021-09-01
EPSS Score
Score
Percentile
0.12%
31.38%
CVSS Scores
Base score
Version
Severity
Vector
8.8
3.1
—
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
CWEs
CWE id
Name
CWE-346
Origin Validation Error
CWE-668
Exposure of Resource to Wrong Sphere
CWE-942
Permissive Cross-domain Security Policy with Untrusted Domains
Affected packages (1)
Vulnerable version ranges and first patched releases as published by GitHub.
Ecosystem
Package
Vulnerable range
First patched
Vulnerable functions
npm
@theia/mini-browser >= 0.3.9, < 1.9.0
1.9.0
—
cvelogic
Threat Intelligence