CVE-2023-42784Network attack vector

Unauthenticated code execution via malformed HTTP requests

Published Mar 11, 2025 · Updated Mar 11, 2025

Improper request parsing in Fortinet FortiWeb allows remote attackers to execute unauthorized code via crafted HTTP/S requests. Fortinet has not published the affected parser locus or the malformed request structure that reaches the erroneous handling. Successful requests run unauthorized code or commands without authentication or user action, but the HTTP/S service must be network-reachable.

CVSS severity5.6
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper request parsing in Fortinet FortiWeb allows remote attackers to execute unauthorized code via crafted HTTP/S requests. Fortinet has not published the affected parser locus or the malformed request structure that reaches the erroneous handling. Successful requests run unauthorized code or commands without authentication or user action, but the HTTP/S service must be network-reachable.

The record

CVE
CVE-2023-42784
Published
Mar 11, 2025
Updated
Mar 11, 2025
Vendor
Fortinet
Product
FortiWeb
Classifications
CWE-228, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 2025Record 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=7.0.0 <=7.0.10
  2. Affected versionversion=7.2.0 <=7.2.10
  3. Affected versionversion=7.4.0 <=7.4.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fortinet · FortiWebversion=7.0.0 <=7.0.10; version=7.2.0 <=7.2.10; version=7.4.0 <=7.4.7

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.6Fortinet, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-228Improper Handling of Syntactically Invalid Structure
T1190Exploit Public-Facing Application

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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