CVE-2021-24020 is a critical vulnerability affecting FortiMail versions 6.4.0 through 6.4.4 and 6.2.0 through 6.2.7, stemming from a missing cryptographic step in the hash digest algorithm. This flaw allows an unauthenticated attacker to bypass signature verification on signed URLs by appending additional data. With a CVSS score of 9.8 (Critical), this vulnerability presents a high risk due to its network-based attack vector, low complexity, and potential for complete compromise of confidentiality, integrity, and availability. Currently, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 6.2.0, <= 6.2.7CPE matchmatch criteria | cpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:* | ||
>= 6.4.0, < 6.4.5CPE matchmatch criteria | cpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.