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package.json registers a preinstall hook that runs index.js on npm install. index.js collects os.hostname(), os.userInfo(), home directory, DNS server configuration, and reads /etc/passwd and /etc/hosts via fs.readFileSync, then HTTPS-POSTs the payload to the hardcoded Burp Collaborator subdomain mh7rhchf58lgymyr9wffhwfprgx7lx9m.oastify.com. Installing the package on a default npm install causes installer host identifiers and local account/host files to be transmitted to an out-of-band attacker-controlled endpoint.
2.0.1Exploitability
AV:NAC:LPR:NUI:NScope
S:CImpact
C:HI:HA:H10.0/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H