Security readout for executives and security teams
Plain-English summary
CVE-2021-45789 is an authenticated arbitrary file read issue in MeterSphere v1.15.4. A logged-in user may be able to read server-side files through the file download function. Business risk depends on whether MeterSphere is deployed, who has accounts, and what sensitive files exist on the host.
Executive priority
Treat as high priority if MeterSphere v1.15.4 is deployed. The issue can expose sensitive server files, but urgency is lower where access is tightly restricted and trusted.
Technical view
The CVE description says authenticated users can read any file on the server via MeterSphere's file download function in v1.15.4. The source bundle provides no CVSS score, CWE, named fixed version, or detailed affected CPE data. No CISA KEV listing is indicated.
Likely exposure
Exposure is most likely for organizations running MeterSphere v1.15.4, especially multi-user or externally reachable deployments where non-admin authenticated users can access file download functionality.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not marked as KEV. Exploitation requires authenticated access according to the CVE description. Public detail appears limited in the supplied bundle.
Researcher notes
Key gaps are missing CVSS, CWE, affected CPEs, and fixed-version data. Do not assume unauthenticated exploitation or active exploitation from the supplied evidence. Focus validation on authenticated file download behavior and server-side file access boundaries.
Mitigation direction
- Identify any MeterSphere v1.15.4 deployments.
- Check MeterSphere issue 8652 and vendor guidance for a fixed version.
- Restrict MeterSphere access to trusted users and networks.
- Review permissions around file download functionality.
- Rotate secrets if logs suggest sensitive file exposure.
Validation and detection
- Confirm installed MeterSphere versions across environments.
- Review application logs for unusual file download activity.
- Check whether untrusted users have MeterSphere accounts.
- Perform authorized negative testing with non-sensitive canary files.
- Document any compensating controls or upgrade blockers.
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-2021-45789 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://github.com/metersphere/metersphere/issues/8652CVE 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.