CVE-2021-28374: Debian Courier-Authlib
High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.
The Debian courier-authlib package before 0.71.1-2 for Courier Authentication Library creates a /run/courier/authdaemon directory with weak permissions, allowing an attacker to read user information. This may include a cleartext password in some configurations. In general, it includes the user's existence, uid and gids, home and/or Maildir directory, quota, and some type of password information (such as a hash).
Affected products
Published 2021-03-15. Last modified 2026-06-17.