Security readout for executives and security teams
Plain-English summary
CVE-2021-24021 is a stored cross-site scripting issue in Fortinet FortiAnalyzer. An authenticated attacker could tamper with Logview column settings so malicious content is stored and later rendered. The source describes limited impact: integrity only, with no confidentiality or availability impact in the CVSS vector.
Executive priority
Treat this as a moderate-priority management-plane hardening and upgrade item. It is not described as actively exploited or unauthenticated, but FortiAnalyzer is security infrastructure, so affected systems should be identified and remediated through vendor guidance.
Technical view
The vulnerability is CWE-79 improper input neutralization in FortiAnalyzer Logview column settings. A remote authenticated attacker may perform stored XSS if they can obtain the relevant POST request through other hypothetical attacks. Affected versions listed are FortiAnalyzer 6.4.3 and below, 6.2.7 and below, and 6.0.10 and below.
Likely exposure
Exposure is most likely in organizations running FortiAnalyzer management interfaces on affected 6.4, 6.2, or 6.0 releases with accounts available to non-administrative or less-trusted users. Internet exposure is not stated in the sources, but remote network access and authentication are part of the CVSS conditions.
Exploitation context
The CVE record does not show CISA KEV listing, and the provided sources do not establish active exploitation. Exploitation requires an authenticated attacker and also depends on obtaining a specific POST request through other hypothetical attacks, which narrows practical abuse compared with unauthenticated XSS.
Researcher notes
The strongest constraints are PR:L and the unusual dependency on obtaining the Logview column-settings POST request through other hypothetical attacks. Sources do not provide exploit details, observed exploitation, or explicit fixed releases in the supplied bundle, so validation should stay version- and access-control focused.
Mitigation direction
- Identify FortiAnalyzer instances running affected 6.4, 6.2, or 6.0 versions.
- Review Fortinet advisory FG-IR-20-098 for vendor-confirmed fixed versions and upgrade guidance.
- Restrict FortiAnalyzer access to trusted administrative networks and approved users.
- Review privileged and low-privilege FortiAnalyzer account access for unnecessary exposure.
Validation and detection
- Inventory FortiAnalyzer versions and compare them with the affected version list.
- Confirm whether Logview access is available to low-trust authenticated users.
- Review FortiAnalyzer access controls and management-interface network exposure.
- Check Fortinet guidance before marking any specific version as remediated.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
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CVE-2021-24021 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.3 (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:N/E:F/RL:X/RC:X
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:F/RL:X/RC:X2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:F/RL:X/RC:X
Source materials
- CVE List V5 sourceCVE List V5
- https://fortiguard.com/advisory/FG-IR-20-098CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.