Security readout for executives and security teams
Plain-English summary
Fortinet FortiWeb versions in the affected ranges could expose the password that its vulnerability scanner uses for a configured target device. The attacker must already be authenticated, so this is not an unauthenticated internet-wide issue, but leaked scanner credentials could support follow-on access depending on where those credentials are reused.
Executive priority
Treat this as a medium-priority credential exposure issue. It is lower urgency than unauthenticated remote compromise, but remediation matters because exposed scanner passwords can create secondary access risk if they protect important devices or are reused elsewhere.
Technical view
CVE-2020-15942 is an information disclosure flaw in FortiWeb Web Vulnerability Scan profiles. A remote authenticated attacker may read the password used by the FortiWeb scanner to access a device defined in the scan profile. CVSS 3.1 is 4.3: network, low complexity, low privileges, no user interaction, confidentiality impact only.
Likely exposure
Organizations running Fortinet FortiWeb 6.2.x below 6.2.4 or 6.3.x below 6.3.5 are potentially exposed, especially where multiple administrators or operators can access Web Vulnerability Scan profiles.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The vulnerability requires authenticated remote access to FortiWeb and appears limited to disclosure of stored scanner credentials, not direct code execution, integrity compromise, or availability impact.
Researcher notes
The source bundle provides no CWE and no public exploit status. The affected description is range-based, while the affected entry lists FortiWeb 6.3.4 and 6.2.3. Validation should focus on FortiWeb versions and credential exposure in Web Vulnerability Scan profiles.
Mitigation direction
- Upgrade affected FortiWeb systems to 6.2.4, 6.3.5, or later supported releases.
- Review Fortinet PSIRT guidance for any version-specific instructions.
- Restrict FortiWeb administrative access to trusted operators and networks.
- Rotate passwords stored in affected scan profiles after remediation.
- Avoid credential reuse between scan profiles and privileged systems.
Validation and detection
- Inventory FortiWeb appliances and confirm exact firmware versions.
- Identify systems running 6.2.x below 6.2.4 or 6.3.x below 6.3.5.
- Review scan profiles for stored target-device credentials.
- Confirm FortiWeb administrative roles follow least privilege.
- Check logs for unusual authenticated access to scan profile configuration.
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.
Credential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-15942 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
- 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:L/I:N/A:N
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:L/I:N/A:N2.81.4Primary 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:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://fortiguard.com/advisory/FG-IR-20-076CVE reference · x_refsource_CONFIRM
- https://www.fortiguard.com/psirt/FG-IR-20-076CVE 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.