OpenSSF/OSV advisory MAL-2026-13431 confirms this npm version as malicious. payload.js is declared as the package `main` and runs an IIFE immediately on require/import. It fetches a wordlist of Linux binary names from https://unpkg.com/@itsreduxtm/unpkg-xss-test@1.0.4/binlist.txt and issues concurrent HEAD requests to https://entretienextremejb.ca/bin/<name> for each entry, sourcing the traffic from the installer's machine and IP address...
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in @itsreduxtm/unpkg-xss-test (npm)
Details
payload.js is declared as the package `main` and runs an IIFE immediately on require/import. It fetches a wordlist of Linux binary names from https://unpkg.com/@itsreduxtm/unpkg-xss-test@1.0.4/binlist.txt and issues concurrent HEAD requests to https://entretienextremejb.ca/bin/<name> for each entry, sourcing the traffic from the installer's machine and IP address. The package name (`unpkg-xss-test`) and GTFOBins-style wordlist shape indicate this is a browser XSS-delivered path-enumeration payload; when loaded in Node (fetch is global in Node 18+), the installer conducts the scan against a third party. This covertly weaponizes the installer's identity for reconnaissance against an unrelated site, exposing the installer to abuse reports, IP blocklisting, and potential legal complaints for unauthorized scanning.
Decision reason
OpenSSF Malicious Packages via OSV confirms @itsreduxtm/unpkg-xss-test@1.0.5 as malicious (MAL-2026-13431): Malicious code in @itsreduxtm/unpkg-xss-test (npm)