Critical severity · published Feb 24, 2021
CVE-2020-27224
In Eclipse Theia versions up to and including 1.2.0, the Markdown Preview (@theia/preview), can be exploited to execute arbitrary code
9.6
CVSS
2.6%
EPSS
No
On KEV
Description
In Eclipse Theia versions up to and including 1.2.0, the Markdown Preview (@theia/preview), can be exploited to execute arbitrary code.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)2.6% · higher than 85% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TH
Theia · Eclipse
through 1.2.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-27224
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-27224
Exploit
https://github.com/eclipse-theia/theia/issues/7954
Exploit
https://omespino.com/write-up-google-bug-bounty-xss-to-cloud-shell-instance-takeover-rce-as-root-5000-usd/
More from Theia
9.8
CVE-2021-34436
In Eclipse Theia 0.1.1 to 0.2.0, it is possible to exploit the default build to obtain remote code execution (and XXE) via the theia-xml-extension
8.8
CVE-2026-60009
In Eclipse Theia versions up to and including 1.73.1, the `@theia/filesystem` backend binds `POST /file-upload` in every filesystem-enabled deployment
8.8
CVE-2026-44691
In Eclipse Theia versions prior to 1.69.0, custom task definitions in workspace files (e.g
8.8
CVE-2026-46580
In Eclipse Theia versions prior to 1.71.0, files matching the pattern .prompts/*.prompttemplate in a workspace were automatically loaded and could override or extend the AI…
8.8
CVE-2026-44688
In Eclipse Theia versions prior to 1.71.0, the AI chat agent processed workspace file and directory names as part of its prompt context without distinguishing them from system…
