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CVE-2021-4260

21
FAUCET Score

CVE-2021-4260 is a critical open redirect vulnerability found in the core/Web.js file of the oils-js_project oils-js library. This flaw allows remote attackers to manipulate URLs, redirecting users to malicious sites. With a CVSS score of 6.1 (Medium), it requires user interaction and has low impact on confidentiality and integrity, but no impact on availability. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 2021-03-23CPE matchmatch criteria
cpe:2.3:a:oils-js_project:oils-js:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

6.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.37%
Probability of exploitation in next 30 days
EPSS Percentile
30.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0037 is in the 30th percentile among its peer group of 26,221 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: oilsFixed in: 8.0.0

Vendor Advisories (1)

npmGHSA-v279-v2xm-whq9medium

Oils JS vulnerable to Open Redirect

Dec 19, 2022

References

github.com / mannyvergel/oils-js/commit/fad8fbae824a7d367dacb90d56cb02c5cb999d42
PatchThird Party Advisory
vuldb.com
Third Party Advisory