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CVE-2021-4307

30
FAUCET Score

CVE-2021-4307 is a critical prototype pollution vulnerability affecting Yomguithereal Baobab versions up to 2.6.0. This flaw allows for improperly controlled modification of object prototype attributes, potentially leading to severe impacts. With a CVSS score of 9.8, it is remotely exploitable with low attack complexity, enabling full compromise of confidentiality, integrity, and availability. While no public exploit intelligence or active exploitation has been observed, and community discussion is minimal, upgrading to Baobab version 2.6.1 is strongly recommended to mitigate this high-risk vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0.0, < 2.6.1CPE matchmatch criteria
cpe:2.3:a:baobab_project:baobab:*:*:*:*:*:*:*:*

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
1.26%
Probability of exploitation in next 30 days
EPSS Percentile
66.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0126 is in the 53rd percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 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 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: baobabFixed in: 2.6.1

Vendor Advisories (1)

npmGHSA-wvr2-q86m-6whpcritical

Baobab vulnerable to Prototype Pollution

Jan 7, 2023

References

github.com / Yomguithereal/baobab/commit/c56639532a923d9a1600fb863ec7551b188b5d19
Patch
github.com / Yomguithereal/baobab/pull/511
ExploitPatchThird Party Advisory
github.com / Yomguithereal/baobab/releases/tag/2.6.1
Release Notes
vuldb.com
Third Party AdvisoryVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry