9.8

CVE-2023-47539: fortinet fortimail Improper Access Control

Analyzed
Published 18-03-2025Last modified 26-02-2026

Vulnerability summary

CVE-2023-47539 is a critical (CVSS 9.8) Improper Access Control vulnerability in fortinet fortimail. EPSS estimates a 1.06% chance of exploitation in the next 30 days, higher than 64.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
1.06%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 18-03-2025
    PublishedVulnerability first disclosed.
  2. 26-02-2026
    Last modifiedVulnerability information updated.

Description

An improper access control vulnerability in FortiMail version 7.4.0 configured with RADIUS authentication and remote_wildcard enabled may allow a remote unauthenticated attacker to bypass admin login via a crafted HTTP request.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

1.06%

Chance of exploitation in the next 30 days

Percentile

64%

Versus all other CVEs

30-day change

Increase +0.02 pp

From 1.04% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Fortinet1 product

1 vendor · 1 product

References

1 links