Versions of the npm CLI prior to 6.13.4 are vulnerable to an Arbitrary File Overwrite. It fails to prevent existing globally-installed binaries to be overwritten by other package installations. For example, if a package was installed globally and created a serve binary, any subsequent installs of packages that also create a serve binary would overwrite the previous serve binary. This behavior is still allowed in local installations and also through install scripts. This vulnerability bypasses a user using the --ignore-scripts install option.
Exploitability
AV:NAC:HPR:LUI:RScope
S:CImpact
C:HI:HA:N7.7/CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:NInput Validation