CVE & CISA-KEV Catalog

CVE-2021-34435

HIGH
8.8
CVSS v3
NVD

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..

CWE-942CWE-346

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

0.60%probability of exploitation in 30 days
44thpercentile

Moderate risk: more likely to be exploited than 44% of all known CVEs.

References

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CVE-2021-34435 severity badge

Markdown

[![CVE-2021-34435](https://tridentstack.com/cve/badge/CVE-2021-34435.svg)](https://tridentstack.com/cve/CVE-2021-34435)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-34435"><img src="https://tridentstack.com/cve/badge/CVE-2021-34435.svg" alt="CVE-2021-34435"></a>

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.