What is CVE-2023-36633?

CVE-2023-36633 is a medium-severity vulnerability in Fortinet Fortimail, classified under Improper Authorization. CVSS score: 5.4/10. Published 2023-11-14.

How severe is CVE-2023-36633?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Fortinet Fortimail

CVE-2023-36633

An improper authorization vulnerability [CWE-285] in FortiMail webmail version 7.2.0 through 7.2.2 and before 7.0.5 allows an authenticated attacker to see and modify the title of address book folders of other users via crafted HTTP or HTTPs requests.

Published 2023-11-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (38.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Fortinet Fortimail — versions 7.2.0, 7.0.0, 6.4.0

Weakness classification (CWE)

References

fortiguard.com/psirt/FG-IR-23-203 (Vendor Advisory)

Frequently asked questions

What is CVE-2023-36633?: CVE-2023-36633 is a medium-severity vulnerability in Fortinet Fortimail, classified under Improper Authorization. CVSS score: 5.4/10. Published 2023-11-14.
How severe is CVE-2023-36633?: Medium severity. CVSS v3 base score is 5.4 out of 10.