MEDIUM
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.
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00027.html
https://access.redhat.com/errata/RHEA-2020:0330
https://access.redhat.com/errata/RHSA-2020:0573
https://access.redhat.com/errata/RHSA-2020:0579
https://access.redhat.com/errata/RHSA-2020:0597
https://access.redhat.com/errata/RHSA-2020:0602
https://blog.npmjs.org/post/189618601100/binary-planting-with-the-npm-cli
https://github.com/npm/cli/security/advisories/GHSA-4328-8hgf-7wjr
Source: MITRE
Published: 2019-12-13
Updated: 2020-10-09
Type: CWE-269
Base Score: 5.5
Vector: AV:N/AC:L/Au:S/C:N/I:P/A:P
Impact Score: 4.9
Exploitability Score: 8
Severity: MEDIUM
Base Score: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Impact Score: 3.6
Exploitability Score: 2.8
Severity: MEDIUM