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CVE-2021-41088

27
FAUCET Score

CVE-2021-41088 affects Elvish, a programming language and shell, specifically versions prior to 0.14.0 when the web UI backend is active. This vulnerability allows a malicious website to execute arbitrary code on a user's system due to improper origin checking in the web UI backend. Rated 8.8 HIGH (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), it indicates a network-based attack with low complexity, requiring user interaction, leading to high confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.14.0CPE matchmatch criteria
cpe:2.3:a:elv:elvish:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.0HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.3
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.54%
Probability of exploitation in next 30 days
EPSS Percentile
42.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0054 is in the 44th percentile among its peer group of 14,855 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/elves/elvishFixed in: 0.14.0

Vendor Advisories (1)

goGHSA-fpv6-f8jw-rc3rhigh

Elvish vulnerable to remote code execution via the web UI backend

Sep 23, 2021

References

github.com / elves/elvish/commit/ccc2750037bbbfafe9c1b7a78eadd3bd16e81fe5
PatchThird Party Advisory
github.com / elves/elvish/security/advisories/GHSA-fpv6-f8jw-rc3r
Third Party Advisory