Vulnerability Database

311,379

Total vulnerabilities in the database

CVE-2021-24020

A missing cryptographic step in the implementation of the hash digest algorithm in FortiMail 6.4.0 through 6.4.4, and 6.2.0 through 6.2.7 may allow an unauthenticated attacker to tamper with signed URLs by appending further data which allows bypass of signature verification.

  • Published: Jul 9, 2021
  • Updated: Nov 16, 2025
  • CVE: CVE-2021-24020
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/Au:N/C:P/I:P/A:P

CWEs:

Software From Fixed in
fortinet / fortimail 6.4.0 6.4.5
fortinet / fortimail 6.2.0 6.2.7.x