LiveActive security incident?Get immediate response
CVE Record

CVE-2021-24014: Multiple instances of improper neutralization of input during web page generation vulnerabilities in FortiS...

Multiple instances of improper neutralization of input during web page generation vulnerabilities in FortiSandbox before 4.0.0 may allow an unauthenticated attacker to perform an XSS attack via specifically crafted request parameters.

MediumCVSS 5.4Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

FortiSandbox versions before 4.0.0 have multiple cross-site scripting weaknesses. An attacker may be able to craft request parameters that cause malicious script to run in a user’s browser. Business impact is mainly account/session risk and potential data exposure through the FortiSandbox web experience, not direct system takeover based on the provided sources.

Executive priority

Prioritize in normal patch cycles, faster if FortiSandbox is internet-facing or broadly accessible internally. The issue is not known exploited from provided evidence, but XSS in a security appliance can still affect administrator trust, sessions, and sensitive workflow data.

Technical view

The issue is improper neutralization of input during web page generation in Fortinet FortiSandbox before 4.0.0. The CVE description says unauthenticated attack via crafted request parameters, while the CVSS vector lists low privileges and user interaction. Scope is changed, with low confidentiality and integrity impact and no availability impact.

Likely exposure

Exposure is limited to organizations running Fortinet FortiSandbox before 4.0.0. Risk increases where the FortiSandbox web interface or affected pages are reachable by untrusted users or where administrators may follow crafted links.

Exploitation context

The source bundle does not report known exploitation, and the CVE is not listed as CISA KEV. Exploitation requires a crafted request parameter and user interaction per CVSS. Treat this as a credible web-session risk, not confirmed active exploitation.

Researcher notes

Note the inconsistency between the description’s unauthenticated wording and the CVSS PR:L vector. Validation should focus on exact FortiSandbox version, web interface reachability, and whether affected pages are accessible to untrusted users. No CWE is provided in the source bundle.

Mitigation direction

  • Upgrade FortiSandbox to version 4.0.0 or later if affected.
  • Review Fortinet advisory FG-IR-20-209 for vendor-specific remediation guidance.
  • Restrict FortiSandbox web interface access to trusted administrative networks.
  • Warn administrators against opening untrusted FortiSandbox links until remediated.
  • Monitor FortiSandbox web logs for suspicious crafted request parameters.

Validation and detection

  • Inventory FortiSandbox deployments and record installed versions.
  • Confirm no production instance is running a version before 4.0.0.
  • Review exposure of the FortiSandbox web interface to untrusted networks.
  • Check logs for unusual requests targeting FortiSandbox web pages.
  • After remediation, verify the reported FortiSandbox version is 4.0.0 or later.
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.

cve · low confidence lookup

CVE-2021-24014 mapping review

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

Open ATT&CK lookup
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:R/S:C/C:L/I:L/A:N/E:U/RL:X/RC:X

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:R/S:C/C:L/I:L/A:N/E:U/RL:X/RC:X2.32.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.4Medium
CVSS 3.1 vector shape for CVE-2021-24014Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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 FortiSandboxFortiSandbox before 4.0.0Listed
Weakness

CWE details

No CWE listed

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