A improper restriction of excessive authentication attempts vulnerability [CWE-307] in Fortinet FortiMail version 6.4.0, version 6.2.0 through 6.2.4 and before 6.0.9 allows a remote unauthenticated attacker to partially exhaust CPU and memory via sending numerous HTTP requests to the login form
Published Mar 9, 2023
5.3
MEDIUMCVSS 3.1
EPSS 1.81%
Description
A improper restriction of excessive authentication attempts vulnerability [CWE-307] in Fortinet FortiMail version 6.4.0, version 6.2.0 through 6.2.4 and before 6.0.9 allows a remote unauthenticated attacker to partially exhaust CPU and memory via sending numerous HTTP requests to the login form.
Affected products
-
- Version 5.4.0StatusaffectedConstraints<=5.4.12
- Version 6.0.0StatusaffectedConstraints<=6.0.9
- Version 6.2.1StatusaffectedConstraints<=6.2.4
- Version 6.4.0StatusaffectedConstraints-
- Version
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
Please upgrade to FortiAuthenticator version 6.5.0 or above, Please upgrade to FortiDeceptor version 3.2.0 or above. Please upgrade to FortiMail version 6.4.1 or above, Please upgrade to FortiMail version 6.2.5 or above, Please upgrade to FortiMail version 6.0.10 or above.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
1 other source (CVE.org) ▾
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:X
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Oct 22, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2023–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (23 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.81% (0.01808) | 77.80th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.81% (0.01808) | 75.69th | v5 (v2026.06.15) |
| Mar 15, 2026 | 24.30% (0.24305) | 96.01th | v4 (v2025.03.14) |
| Mar 12, 2026 | 14.66% (0.14660) | 94.36th | v4 (v2025.03.14) |
| Mar 10, 2026 | 7.85% (0.07846) | 91.85th | v4 (v2025.03.14) |
| Jan 3, 2026 | 9.85% (0.09853) | 92.78th | v4 (v2025.03.14) |
| Dec 2, 2025 | 8.50% (0.08501) | 92.06th | v4 (v2025.03.14) |
| Nov 21, 2025 | 6.95% (0.06948) | 91.03th | v4 (v2025.03.14) |
| Nov 18, 2025 | 9.30% (0.09298) | 91.91th | v4 (v2025.03.14) |
| Mar 30, 2025 | 7.12% (0.07125) | 90.68th | v4 (v2025.03.14) |
| Mar 29, 2025 | 21.33% (0.21329) | 92.97th | v4 (v2025.03.14) |
| Mar 28, 2025 | 7.12% (0.07125) | 90.69th | v4 (v2025.03.14) |
| Mar 27, 2025 | 21.33% (0.21329) | 94.88th | v4 (v2025.03.14) |
| Mar 20, 2025 | 13.28% (0.13282) | 93.63th | v4 (v2025.03.14) |
| Mar 19, 2025 | 20.90% (0.20897) | 94.92th | v4 (v2025.03.14) |
| Mar 17, 2025 | 12.98% (0.12980) | 93.51th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.14% (0.00143) | 51.55th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.12% (0.00122) | 45.52th | v3 (v2023.03.01) |
| Feb 7, 2024 | 0.09% (0.00087) | 35.97th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.07% (0.00073) | 30.11th | v3 (v2023.03.01) |
| Jun 16, 2023 | 0.08% (0.00082) | 33.64th | v3 (v2023.03.01) |
| Mar 16, 2023 | 0.07% (0.00073) | 29.67th | v3 (v2023.03.01) |
| Mar 10, 2023 | 0.05% (0.00050) | 16.45th | v3 (v2023.03.01) |
References (1)
- https://fortiguard.com/psirt/FG-IR-20-078 Vendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://fortiguard.com/psirt/FG-IR-20-078 | Vendor Advisory |
Change history (0)
No recorded changes yet.