Security readout for executives and security teams
Plain-English summary
VMware vRealize Log Insight 8.x before 8.4 has an XSS flaw in the UI. A logged-in attacker may inject malicious content that runs when another user opens a shared dashboard link. The supplied evidence points to browser-side impact, not direct server takeover.
Executive priority
Treat as a moderate-priority remediation for affected Log Insight environments. It needs authentication and user interaction, but it can compromise trust in a security monitoring interface.
Technical view
The vulnerability is caused by improper user input validation in VMware vRealize Log Insight. An attacker with user privileges may inject a payload through the UI, which executes in a victim browser when the shared dashboard link is accessed. Affected versions are 8.x prior to 8.4.
Likely exposure
Exposure is likely limited to organizations running VMware vRealize Log Insight 8.x before 8.4. Risk is higher where many users can create or share dashboards internally.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. Exploitation requires user privileges and a victim accessing the shared dashboard link.
Researcher notes
Evidence is sparse: no CVSS, CWE, or detailed advisory content was included beyond the CVE description and VMware advisory reference. Do not assume unauthenticated exploitation or server-side code execution from these sources.
Mitigation direction
- Upgrade VMware vRealize Log Insight to 8.4 or later.
- Review VMware VMSA-2021-0019 for official remediation guidance.
- Limit dashboard creation and sharing to trusted users until remediated.
- Monitor for unusual shared dashboard activity or unexpected UI content.
Validation and detection
- Inventory VMware vRealize Log Insight deployments and confirm versions.
- Flag any 8.x deployment below 8.4 as affected.
- Review user roles that can create or share dashboards.
- Check recent shared dashboard activity for suspicious changes.
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-2021-22021 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.vmware.com/security/advisories/VMSA-2021-0019.htmlCVE reference · x_refsource_MISC
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.