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CVE Record

CVE-2021-32594: An unrestricted file upload vulnerability in the web interface of FortiPortal 6.0.0 through 6.0.4, 5.3.0 th...

An unrestricted file upload vulnerability in the web interface of FortiPortal 6.0.0 through 6.0.4, 5.3.0 through 5.3.5, 5.2.0 through 5.2.5, and 4.2.2 and earlier may allow a low-privileged user to potentially tamper with the underlying system's files via the upload of specifically crafted files.

MediumCVSS 5.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

FortiPortal has a file upload flaw that could let a low-privileged authenticated user alter files on the underlying system. The issue is not rated critical, but it can affect system integrity and availability in affected FortiPortal deployments.

Executive priority

Treat as a planned but important remediation. Prioritize faster if FortiPortal is externally reachable or used by many low-privileged tenant accounts.

Technical view

CVE-2021-32594 is an unrestricted file upload issue in FortiPortal web interface versions 6.0.0-6.0.4, 5.3.0-5.3.5, 5.2.0-5.2.5, and 4.2.2 and earlier. CVSS 3.1 is 5.4 with network access, low attack complexity, low privileges, no user interaction, and low integrity and availability impact.

Likely exposure

Exposure is limited to organizations running the listed FortiPortal versions. Risk increases where the web interface is reachable by many tenant, partner, or administrative users with low-privileged accounts.

Exploitation context

The bundle does not show CISA KEV listing or evidence of active exploitation. The CVSS vector includes proof-of-concept exploit maturity, but no exploit details are provided here.

Researcher notes

The source bundle does not include CWE mapping, fixed versions, or detailed exploit mechanics. Analysis should stay tied to Fortinet guidance and authenticated upload exposure.

Mitigation direction

  • Identify all FortiPortal deployments and record exact versions.
  • Check Fortinet advisory FG-IR-21-092 for fixed versions and workarounds.
  • Upgrade or remediate affected FortiPortal versions per Fortinet guidance.
  • Restrict FortiPortal web interface access to trusted networks and users.
  • Review low-privileged accounts and remove unnecessary access.

Validation and detection

  • Confirm whether FortiPortal versions match the affected version ranges.
  • Verify Fortinet-recommended fixes or mitigations are applied.
  • Review web upload and system-file change logs for suspicious activity.
  • Check whether the FortiPortal interface is exposed beyond trusted networks.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

File access behavior lookup

The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-32594 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.4 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:P/RL:U/RC:C

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.4CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:P/RL:U/RC:C2.82.5Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.4Medium
CVSS 3.1 vector shape for CVE-2021-32594Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:P/RL:U/RC:C

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
FortinetFortinet FortiPortalFortiPortal 6.0.0 through 6.0.4, 5.3.0 through 5.3.5, 5.2.0 through 5.2.5, and 4.2.2 and earlierListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.