Vulnerability Description
Elvish is a programming language and interactive shell, combined into one package. In versions prior to 0.14.0 Elvish's web UI backend (started by `elvish -web`) hosts an endpoint that allows executing the code sent from the web UI. The backend does not check the origin of requests correctly. As a result, if the user has the web UI backend open and visits a compromised or malicious website, the website can send arbitrary code to the endpoint in localhost. All Elvish releases from 0.14.0 onward no longer include the the web UI, although it is still possible for the user to build a version from source that includes the web UI. The issue can be patched for previous versions by removing the web UI (found in web, pkg/web or pkg/prog/web, depending on the exact version).
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Elv | Elvish | < 0.14.0 |
Related Weaknesses (CWE)
References
- https://github.com/elves/elvish/commit/ccc2750037bbbfafe9c1b7a78eadd3bd16e81fe5PatchThird Party Advisory
- https://github.com/elves/elvish/security/advisories/GHSA-fpv6-f8jw-rc3rThird Party Advisory
- https://github.com/elves/elvish/commit/ccc2750037bbbfafe9c1b7a78eadd3bd16e81fe5PatchThird Party Advisory
- https://github.com/elves/elvish/security/advisories/GHSA-fpv6-f8jw-rc3rThird Party Advisory
FAQ
What is CVE-2021-41088?
CVE-2021-41088 is a vulnerability with a CVSS score of 8.0 (HIGH). Elvish is a programming language and interactive shell, combined into one package. In versions prior to 0.14.0 Elvish's web UI backend (started by `elvish -web`) hosts an endpoint that allows executin...
How severe is CVE-2021-41088?
CVE-2021-41088 has been rated HIGH with a CVSS base score of 8.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-41088?
Check the references section above for vendor advisories and patch information. Affected products include: Elv Elvish.