Security readout for executives and security teams
Plain-English summary
Fortinet FortiWLM versions 8.6.1 and below contain a cross-site scripting flaw. An attacker with low privileges can send crafted web requests that may cause malicious JavaScript to run in a victim user's browser. Business impact is mainly session abuse, data exposure, or unauthorized actions through the victim's FortiWLM web session.
Executive priority
Treat as a moderate-priority management-plane issue. Prioritize remediation where FortiWLM is reachable beyond a tightly controlled admin network or where privileged users regularly access the interface.
Technical view
CVE-2021-42752 is an improper input neutralization issue during web page generation in Fortinet FortiWLM. CVSS 3.1 is 5.4: network reachable, low attack complexity, low privileges required, user interaction required, changed scope, low confidentiality and integrity impact, no availability impact.
Likely exposure
Exposure is limited to organizations running Fortinet FortiWLM 8.6.1 or listed older versions, especially where the web interface is reachable by administrators or users from less trusted networks.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. Exploitation requires a crafted HTTP request and victim interaction, so risk depends on who can access the FortiWLM interface and whether targeted users are authenticated.
Researcher notes
Evidence supports reflected or stored web-page JavaScript execution risk but does not identify the exact endpoint, payload form, or fixed version in the supplied bundle. Avoid assuming exploitability beyond CVSS: PR:L and UI:R are material constraints.
Mitigation direction
- Check Fortinet FG-IR-21-111 for the supported fixed version and upgrade path.
- Restrict FortiWLM web interface access to trusted administrative networks.
- Review account privileges for users who can reach FortiWLM management pages.
- Apply browser and session protections recommended by Fortinet guidance.
- Monitor Fortinet advisories for any changed remediation or exploitation guidance.
Validation and detection
- Inventory FortiWLM deployments and confirm exact running versions.
- Flag any FortiWLM version 8.6.1 or older listed affected release.
- Confirm management interface exposure from user, admin, VPN, and internet paths.
- Review FortiWLM web logs for unusual crafted requests around user sessions.
- Verify remediation against Fortinet advisory guidance after upgrade or configuration change.
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.
CVE-2021-42752 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
- 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:P/RL:X/RC:C
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:R/S:C/C:L/I:L/A:N/E:P/RL:X/RC:C2.32.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:P/RL:X/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://fortiguard.com/advisory/FG-IR-21-111CVE 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.