The Alertmanager in CNCF Cortex before 1.8.1 has a local file disclosure vulnerability when -experimental.alertmanager.enable-api is used. The HTTP basic auth password_file can be used as an attack vector to send any file content via a webhook. The alertmanager templates can be used as an attack vector to send any file content because the alertmanager can load any text file specified in the templates list.
{ "nvd_published_at": "2021-04-30T13:15:00Z", "github_reviewed_at": "2021-05-20T21:19:40Z", "severity": "MODERATE", "github_reviewed": true, "cwe_ids": [ "CWE-20" ] }