CVE-2018-20225

A flaw was found in python-pip. The software installs the version with the highest version number, even if the user had intended to obtain a private package from a private index. This only affects use of the --extra-index-url option, and exploitation requires that the package does not already exist in the public index (and thus the attacker can put the package there with an arbitrary version number).

Mitigation

To protect from any unintended behavior, use --index-url and do not use --extra-index-url OR explicitly set --index-url and use --extra-index-url.