GHSA-75v8-2h7p-7m2m Formidable relies on hexoid to prevent guessing of filenames for untrusted executable content

• npm formidable: >= 3.1.1-canary.20211030, < 3.5.3 → fixed in 3.5.3 • npm formidable: >= 2.1.0, < 2.1.3 → fixed in 2.1.3

Formidable (aka node-formidable) 2.x before 2.1.3 and 3.x before 3.5.3 relies on hexoid to prevent guessing of filenames for untrusted executable content; however, hexoid is documented as not "cryptographically secure." (Also, there is a scenario in which only the last two characters of a hexoid string need to be guessed, but this is not often relevant.) NOTE: this does not imply that, in a typical use case, attackers will be able to exploit any hexoid behavior to upload and execute their own content.