CVE-2021-27913

The function mt_rand is used to generate session tokens, this function is cryptographically flawed due to its nature being one pseudorandomness, an attacker can take advantage of the cryptographically insecure nature of this function to enumerate session tokens for accounts that are not under his/her control
This issue affects:
Mautic Mautic
versions prior to 3.3.4;
versions prior to 4.0.0.

Source: CVE-2021-27913