What is the CVSS score of CVE-2023-33302?

CVE-2023-33302 has a CVSS 3.1 base score of 4.7 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L. EPSS exploitation probability: 0.4%.

Which versions of Fortimail are affected by CVE-2023-33302?

Organizations using Fortinet FortiMail webmail and administrative interface should be aware of moderate risk from CVE-2023-33302, a buffer overflow vulnerability rated CVSS 4.7.

How to fix or mitigate CVE-2023-33302?

Within 30 days: Identify affected systems running Fortinet FortiMail webmail and administrative interface and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Fortimail CVE-2023-33302

MEDIUM

Classic Buffer Overflow (CWE-120)

2025-03-31 psirt@fortinet.com

Buffer Overflow Fortinet Fortimail Fortindr

4.7

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

4.7 MEDIUM

AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:34 vuln.today

CVE Published

Mar 31, 2025 - 15:15 nvd

MEDIUM 4.7

DescriptionCVE.org

A buffer copy without checking size of input ('classic buffer overflow') in Fortinet FortiMail webmail and administrative interface version 6.4.0 through 6.4.4 and before 6.2.6 and FortiNDR administrative interface version 7.2.0 and before 7.1.0 allows an authenticated attacker with regular webmail access to trigger a buffer overflow and to possibly execute unauthorized code or commands via specifically crafted HTTP requests.

AnalysisAI

A buffer copy without checking size of input ('classic buffer overflow') in Fortinet FortiMail webmail and administrative interface version 6.4.0 through 6.4.4 and before 6.2.6 and FortiNDR. Rated medium severity (CVSS 4.7), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. A buffer copy without checking size of input ('classic buffer overflow') in Fortinet FortiMail webmail and administrative interface version 6.4.0 through 6.4.4 and before 6.2.6 and FortiNDR administrative interface version 7.2.0 and before 7.1.0 allows an authenticated attacker with regular webmail access to trigger a buffer overflow and to possibly execute unauthorized code or commands via specifically crafted HTTP requests. Affected products include: Fortinet Fortimail, Fortinet Fortindr. Version information: version 6.4.0.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.