dbcve.org
FortimailApplication · Fortinet

CVE-2021-43062

MEDIUM · 6.1 CVSS v3.1 Published 2022-02-02
Fix available
A fix is available. Upgrade to 6.2.8 / 6.4.6 or later.
See remediation →
68/100
Remediation priority · Elevated
Public exploit Remotely reachable No privileges

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
A improper neutralization of input during web page generation ('cross-site scripting') in Fortinet FortiMail version 7.0.1 and 7.0.0, version 6.4.5 and below, version 6.3.7 and below, version 6.0.11 and below allows attacker to execute unauthorized code or commands via crafted HTTP GET requests to the FortiGuard URI protection service.

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
FortimailApplication
Affected:>= 6.2.0, < 6.2.8>= 6.4.0, < 6.4.6>= 7.0.0, < 7.0.2

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 6.2.8 / 6.4.6 / 7.0.2 or later
Fixed in 6.2.86.4.67.0.2
Recommended fix High confidence

Upgrade to FortiMail 6.2.8 (for 6.2.x), 6.4.6 (for 6.4.x), or 7.0.2 (for 7.0.x) depending on your current major branch

  1. 1. Identify current FortiMail version via Web UI (System > Status) or CLI: 'get system status'
  2. 2. Determine the appropriate upgrade path based on current major version: 6.2.x -> 6.2.8, 6.4.x -> 6.4.6, 7.0.x -> 7.0.2
  3. 3. Obtain the firmware image from Fortinet support portal or Fortiguard (https://www.fortiguard.com/firmware)
  4. 4. Back up FortiMail configuration via Web UI (System > Maintenance > Backup & Restore) or CLI: 'execute backup config tftp <config-name> <tftp-server>'
  5. 5. Upload the firmware image via Web UI (System > Maintenance > Firmware) or CLI: 'execute upload firmware tftp <firmware-file> <tftp-server>'
  6. 6. Reboot the FortiMail device to apply the upgrade
  7. 7. After reboot, verify new version via 'get system status' and confirm the vulnerability is addressed
  8. 8. Test critical email flows to ensure normal operation
Caveat Review Fortinet release notes for the target version for any configuration changes or deprecated features; test in non-production environment first

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

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $900. Get the upgrade done

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2021-43062 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

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-2021-43062 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

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
  • No spam, self-promotion, credentials, or personal data