Security readout for executives and security teams
Plain-English summary
FortiMail Webmail versions before 6.4.4 contain path traversal flaws that can let a regular authenticated user access files or data they should not see. The CVSS score is high because the stated impact includes confidentiality, integrity, and availability.
Executive priority
Prioritize remediation for internet-reachable or broadly accessible FortiMail Webmail deployments, especially where many regular users have accounts. The issue is high severity but requires authentication based on the supplied sources.
Technical view
CVE-2021-24013 covers multiple path traversal vulnerabilities in Fortinet FortiMail Webmail before 6.4.4. Attack complexity is low, network access is sufficient, user interaction is not required, but low privileges are required. The source bundle does not provide CWE details or precise file paths.
Likely exposure
Exposure is likely limited to organizations running FortiMail Webmail before 6.4.4 where authenticated regular users can reach the Webmail interface.
Exploitation context
The CVE is not listed as KEV in the supplied bundle, and no cited source states active exploitation. The scenario requires valid low-privilege access and crafted web requests, so compromised user accounts could increase practical risk.
Researcher notes
The strongest evidence is the CVE record and Fortinet advisory reference. Details are sparse: no CWE, exploit status, or file scope is provided. Treat impact according to CVSS rather than inferring specific data targets.
Mitigation direction
- Upgrade FortiMail to version 6.4.4 or later.
- Review Fortinet advisory FG-IR-21-014 for vendor-specific guidance.
- Limit Webmail access to trusted users and networks where feasible.
- Monitor authenticated Webmail activity until vulnerable systems are remediated.
Validation and detection
- Inventory all FortiMail deployments and record their running versions.
- Confirm whether Webmail is enabled on any version before 6.4.4.
- Check authentication logs for unusual regular-user Webmail activity.
- After remediation, verify FortiMail reports version 6.4.4 or later.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
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 lookupCVE-2021-24013 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://fortiguard.com/advisory/FG-IR-21-014CVE 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.