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Start learningUpgrade facturascripts/facturascripts to version 2026.3 or higher.
Affected versions of this package are vulnerable to Improper Authentication in the twoFactorValidationAction process. An attacker can gain unauthorized access to any 2FA-enabled user account, including administrative accounts, by sending unauthenticated POST requests containing only the target's username and a brute-forced TOTP code. This is possible because the process does not require password verification, lacks CSRF protection, and does not implement rate limiting, allowing attackers to efficiently guess valid codes and obtain full session cookies. Additionally, repeated failed attempts can be used to lock out legitimate users from accessing their accounts.