Vulnerability Details : CVE-2021-34435
Potential exploit
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..
Products affected by CVE-2021-34435
- cpe:2.3:a:eclipse:theia:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-34435
0.16%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 33 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-34435
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
|
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
CWE ids for CVE-2021-34435
-
The product does not properly verify that the source of data or communication is valid.Assigned by: nvd@nist.gov (Primary)
-
The product uses a cross-domain policy file that includes domains that should not be trusted.Assigned by: emo@eclipse.org (Secondary)
References for CVE-2021-34435
-
https://bugs.eclipse.org/bugs/show_bug.cgi?id=568018
568018 – (CVE-2021-34435) Theia "mini-browser" extension RCE exploitExploit;Patch;Vendor Advisory
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