CVE-2023-25603Network attack vector

Unauthorized privileged actions via arbitrary-origin API trust

Published Nov 14, 2023 · Updated Aug 30, 2024

Permissive cross-domain policy handling in Fortinet FortiADC and FortiDDoS-F allows remote attackers to read data and perform privileged actions. Their APIs trust arbitrary web origins, allowing a site opened in a user's browser to issue cross-origin requests and read responses that the same-origin policy should block. Exploitation requires user interaction but no appliance account for the attacker; successful requests expose sensitive information and permit privileged actions without interrupting service.

CVSS severity5.4
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Permissive cross-domain policy handling in Fortinet FortiADC and FortiDDoS-F allows remote attackers to read data and perform privileged actions. Their APIs trust arbitrary web origins, allowing a site opened in a user's browser to issue cross-origin requests and read responses that the same-origin policy should block. Exploitation requires user interaction but no appliance account for the attacker; successful requests expose sensitive information and permit privileged actions without interrupting service.

The record

CVE
CVE-2023-25603
Published
Nov 14, 2023
Updated
Aug 30, 2024
Vendor
Fortinet
Product
FortiDDoS-F
Classifications
CWE-942
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 30, 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=6.3.0 <=6.3.4
  2. Affected versionversion=6.4.0 <=6.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fortinet · FortiDDoS-Fversion=6.3.0 <=6.3.4; version=6.4.0 <=6.4.1
Fortinet · FortiADCversion=7.1.0 <=7.1.1

Published CVSS scores

5.4Fortinet, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-942Permissive Cross-domain Policy with Untrusted Domains

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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