What is CVE-2021-24020?

CVE-2021-24020 is a high-severity vulnerability in Fortinet Fortimail, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2021-07-09.

How severe is CVE-2021-24020?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Fortinet Fortimail

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 allo…

EPSS: 0.006 (45.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Fortinet Fortimail
Fortinet Fortimail — versions FortiMail 6.4.0 through 6.4.4, and 6.2.0 through 6.2.7

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

psirt@fortinet.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2021-24020?: CVE-2021-24020 is a high-severity vulnerability in Fortinet Fortimail, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2021-07-09.
How severe is CVE-2021-24020?: High severity. CVSS v3 base score is 7.5 out of 10.