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FortisandboxApplication · Fortinet

CVE-2023-41836

MEDIUM · 6.1 CVSS v3.1 Published 2023-10-13
Fix available
A fix is available. Upgrade to after 4.2.4 or later.
See remediation →
68/100
Remediation priority · Elevated
Remotely reachable No privileges Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
An improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Fortinet FortiSandbox 4.4.0, FortiSandbox 4.2.1 through 4.2.4, FortiSandbox 4.0 all versions, FortiSandbox 3.2 all versions, FortiSandbox 3.1 all versions, FortiSandbox 3.0.4 through 3.0.7 allows attacker to execute unauthorized code or commands via crafted HTTP requests.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-79

Untrusted input is placed into a web page without being neutralised, so an attacker's markup or script executes in another user's browser. That can hijack sessions, capture keystrokes, or silently perform actions as the victim. Fixing it properly means context-aware output encoding everywhere data meets HTML, backed by a content-security policy as a second line of defence.

General guidance for the cross-site scripting (xss) class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
FortisandboxApplication
Affected:>= 3.0.4, <= 3.0.7>= 3.1.0, <= 3.1.5>= 3.2.0, <= 3.2.4>= 4.0.0, <= 4.0.4>= 4.2.0, <= 4.2.4= 4.4.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 4.2.4
Vendor patch fortiguard.com →
Recommended fix Moderate confidence

FortiSandbox 4.4.1 or later (check FortiGuard PSIRT FG-IR-23-215 for exact fixed version)

  1. Check current FortiSandbox version via Web UI (Dashboard > Status) or CLI: 'get system status'
  2. Review release notes for FortiSandbox 4.4.1 or later versions for XSS fix details
  3. Plan maintenance window for upgrade (FortiSandbox may require brief downtime)
  4. Backup current configuration via: 'execute backup full-config'
  5. Download firmware from Fortinet Support Portal or FortiGuard (search FG-IR-23-215)
  6. Upload new firmware via Web UI: System > Firmware > Upload, or via CLI: 'execute system firmware upgrade'
  7. Reboot the system after firmware installation completes
  8. Verify upgrade success via 'get system status' and confirm version is 4.4.1 or later
Caveat Review release notes for any configuration or behavioral changes between 4.0.x/4.2.x and 4.4.x; test in staging if possible

Generated from the published advisory — verify against the referenced sources before acting.

We can identify the exact fixed release, upgrade, and verify it in staging — typical engagement from $900. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-41836 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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