includes/core/is_user.php in NukeViet before 4.3.04 deserializes the untrusted nvloginhash cookie (i.e., the code relies on PHP's serialization format when JSON can be used to eliminate the risk).
{ "nvd_published_at": "2020-12-31T05:15:00Z", "github_reviewed_at": "2021-04-07T22:08:23Z", "severity": "CRITICAL", "github_reviewed": true, "cwe_ids": [ "CWE-502" ] }