CVE-2021-24013Network attack vector

Unauthorized file access via crafted web paths

Published Jul 12, 2021 · Updated Oct 25, 2024

Path traversal in Fortinet FortiMail Webmail before 6.4.4 allows remote authenticated users to read unauthorized files via crafted web requests. Fortinet identifies multiple traversal flaws in Webmail but has not published the affected handlers or how request paths evade directory restrictions. A regular Webmail account is required, and successful requests expose files and data outside that account's authorized scope.

CVSS severity8.8
High
EPSS probability1.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Fortinet FortiMail Webmail before 6.4.4 allows remote authenticated users to read unauthorized files via crafted web requests. Fortinet identifies multiple traversal flaws in Webmail but has not published the affected handlers or how request paths evade directory restrictions. A regular Webmail account is required, and successful requests expose files and data outside that account's authorized scope.

The record

CVE
CVE-2021-24013
Published
Jul 12, 2021
Updated
Oct 25, 2024
Vendor
Fortinet
Product
FortiMail
Classifications
CWE-22, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Oct 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=FortiMail before 6.4.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Fortinet · FortiMailversion=FortiMail before 6.4.4

Published CVSS scores

8.8Fortinet, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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