CVE-2023-41843Network attack vector

Reflected XSS via file ondemand rendering endpoint

Published Oct 13, 2023 · Updated Jan 14, 2026

Reflected XSS in the Fortinet FortiSandbox file ondemand rendering endpoint allows remote attackers to execute script via crafted HTTP requests. The GUI endpoint returns attacker-controlled request data in generated page content without sufficient neutralization. Exploitation requires user interaction and an affected GUI session, where injected script can act with that session's browser access.

CVSS severityUnavailable
Unscored
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in the Fortinet FortiSandbox file ondemand rendering endpoint allows remote attackers to execute script via crafted HTTP requests. The GUI endpoint returns attacker-controlled request data in generated page content without sufficient neutralization. Exploitation requires user interaction and an affected GUI session, where injected script can act with that session's browser access.

The record

CVE
CVE-2023-41843
Published
Oct 13, 2023
Updated
Jan 14, 2026
Vendor
Fortinet
Product
FortiSandbox
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 14, 2026Record 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=2.4.1
  2. Affected versionversion=2.5.0 <=2.5.2
  3. Affected versionversion=3.0.0 <=3.0.7
  4. Affected versionversion=3.1.0 <=3.1.5
  5. Affected versionversion=3.2.0 <=3.2.4
  6. Affected versionversion=4.0.0 <=4.0.3
  7. Affected versionversion=4.2.1 <=4.2.5
  8. Affected versionversion=4.4.0 <=4.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fortinet · FortiSandboxversion=2.4.1; version=2.5.0 <=2.5.2; version=3.0.0 <=3.0.7; version=3.1.0 <=3.1.5; version=3.2.0 <=3.2.4; version=4.0.0 <=4.0.3; version=4.2.1 <=4.2.5; version=4.4.0 <=4.4.1

Published CVSS scores

7.3FortinetCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:X/RC:C

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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