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CVE-2025-66219

32
FAUCET Score

CVE-2025-66219 is a critical command injection vulnerability affecting versions 0.2.1 and prior of the 'willitmerge' command-line tool. This flaw arises from the insecure use of the 'exec' child process execution API, which concatenates user-controlled input, allowing for arbitrary command execution. With a CVSS score of 9.8 (Critical), this vulnerability poses a significant risk, enabling unauthenticated attackers to achieve full compromise (confidentiality, integrity, availability) of affected systems with low attack complexity. There is currently no public fix available, and while there are no known active exploits or public exploit code, the vulnerability has garnered some community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.2.1CPE matchmatch criteria
cpe:2.3:a:dontkry:willitmerge:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 4.0

6.9MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
LOW
VS Availability
NONE
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
2.70%
Probability of exploitation in next 30 days
EPSS Percentile
84.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0270 is in the 75th percentile among its peer group of 36,897 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

Vendor Patches (1)

github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

npmGHSA-j9wj-m24m-7jj6medium

willitmerge has a Command Injection vulnerability

Nov 26, 2025

References

github.com / shama/willitmerge/blob/2fe91d05191fb05ac6da685828d109a3a5885028/lib/willitmerge.js
Product
github.com / shama/willitmerge/security/advisories/GHSA-j9wj-m24m-7jj6
ExploitVendor Advisory