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CVE-2021-25916

30
FAUCET Score

CVE-2021-25916 is a critical prototype pollution vulnerability affecting 'patchmerge' versions 1.0.0 through 1.0.1. This flaw allows an unauthenticated attacker to remotely trigger a denial of service and potentially achieve remote code execution due to its high impact on confidentiality, integrity, and availability. Despite its critical CVSS score of 9.8, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.0.0, <= 1.0.1CPE matchmatch criteria
cpe:2.3:a:patchmerge_project:patchmerge:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.51%
Probability of exploitation in next 30 days
EPSS Percentile
88.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0351 is in the 80th percentile among its peer group of 36,833 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: patchmergeFixed in: 1.0.2

Vendor Advisories (1)

npmGHSA-84g3-cv89-m9gmcritical

Prototype pollution vulnerability in 'patchmerge'

Oct 13, 2021

References

github.com / pjshumphreys/patchmerge/commit/5b383c537eae7a00ebd26d3f7211dac99ddecb12
ExploitPatchThird Party Advisory
whitesourcesoftware.com / vulnerability-database/CVE-2021-25916
ExploitThird Party Advisory