Fortimail
CVE-2021-24015
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization OS command sanitization, avoid shell exec
MITRE ATT&CK
2 techniques across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 8.8 (HIGH). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required. |
| Exploit ScenarioDerived | A remote attacker could execute arbitrary operating system commands on the host by sending crafted requests to the affected application. |
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Alert meAnalysisAI
An improper neutralization of special elements used in an OS Command vulnerability in the administrative interface of FortiMail before 6.4.4 may allow an authenticated attacker to execute. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Avoid passing user input to shell commands. Use language-specific APIs instead of shell execution. Apply strict input validation with allowlists.
Affects your stack
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Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as OS Command Injection (CWE-78), which allows attackers to execute arbitrary operating system commands on the host. An improper neutralization of special elements used in an OS Command vulnerability in the administrative interface of FortiMail before 6.4.4 may allow an authenticated attacker to execute unauthorized commands via specifically crafted HTTP requests. Affected products include: Fortinet Fortimail. Version information: before 6.4.4.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
An improper neutralization of special elements used in an OS Command vulnerability in the administrative interface of FortiMail before 6.4.4 may allow an authenticated attacker to execute unauthorized commands via specifically crafted HTTP requests.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
OS command injection occurs when an application passes unsanitized user input directly into system shell commands.
Affected Products (CPE)NVD
Unauthenticated path traversal in Fortinet FortiMail (7.2.0-7.2.9, 7.4.0-7.4.8, 7.6.0-7.6.6 and 8.0.0-8.0.1) lets a remo
An improper authentication vulnerability in FortiMail 5.4.10, 6.0.7, 6.2.2 and earlier and FortiVoiceEntreprise 6.0.0 an
An improper access control vulnerability in FortiMail version 7.4.0 configured with RADIUS authentication and remote_wil
A missing cryptographic step in the implementation of the hash digest algorithm in FortiMail 6.4.0 through 6.4.4, and 6.
Multiple improper neutralization of special elements of SQL commands vulnerabilities in FortiMail before 6.4.4 may allow
Multiple cross-site scripting (XSS) vulnerabilities in admin/FEAdmin.html in Fortinet FortiMail before 4.3.4 on FortiMai
Authenticated SQL injection in Fortinet FortiMail versions 7.6.0 through 7.6.3, 7.4.0 through 7.4.5, and 7.2.0 through 7
An incorrect authorization vulnerability [CWE-863] in FortiMail webmail version 7.2.0 through 7.2.2, version 7.0.0 throu
The combination of various cryptographic issues in the session management of FortiMail 6.4.0 through 6.4.4 and 6.2.0 thr
Multiple instances of incorrect calculation of buffer size in the Webmail and Administrative interface of FortiMail befo
An insufficient verification of data authenticity vulnerability [CWE-345] in FortiClient, FortiMail and FortiOS AV engin
Cross-site scripting (XSS) vulnerability in the Web Action Quarantine Release feature in the WebGUI in Fortinet FortiMai
GitHub PoC
Exploit-DB