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CVE Record

CVE-2021-45790: An arbitrary file upload vulnerability was found in Metersphere v1.15.4.

An arbitrary file upload vulnerability was found in Metersphere v1.15.4. Unauthenticated users can upload any file to arbitrary directory, where attackers can write a cron job to execute commands.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

CVE-2021-45790 describes an unauthenticated arbitrary file upload flaw in MeterSphere v1.15.4. The reported impact is serious because an attacker could place files in arbitrary directories and potentially cause command execution through cron. The source bundle does not provide a CVSS score or confirmed fixed version.

Executive priority

Treat internet-facing MeterSphere v1.15.4 as urgent because the reported flaw combines unauthenticated file upload with possible command execution. Prioritize exposure discovery and containment while confirming vendor remediation details.

Technical view

The public description says MeterSphere v1.15.4 allows unauthenticated users to upload any file to arbitrary directories. It specifically notes attackers may write a cron job to execute commands. No CWE, CVSS vector, patch details, or broader affected-version range are provided in the source bundle.

Likely exposure

Exposure is most likely limited to MeterSphere v1.15.4 instances, especially those reachable by untrusted users. The provided sources do not substantiate other affected versions, products, or deployment configurations.

Exploitation context

The vulnerability is publicly referenced through a GitHub issue and CVE records. The source bundle does not indicate CISA KEV listing, observed exploitation, exploit availability, or exploitation in the wild.

Researcher notes

Evidence is sparse: the CVE description names MeterSphere v1.15.4 and describes arbitrary directory upload with cron-based command execution. It does not include CVSS, CWE mapping, affected-version range, proof of exploitation, or patch metadata.

Mitigation direction

  • Identify and prioritize any MeterSphere v1.15.4 deployments.
  • Restrict MeterSphere access to trusted networks until vendor guidance is confirmed.
  • Review the linked vendor issue and release notes for fixed versions.
  • Audit filesystem permissions around upload and scheduled-task locations.
  • Monitor for unexpected uploaded files or cron-related changes.

Validation and detection

  • Inventory MeterSphere versions across internal and cloud environments.
  • Confirm whether any MeterSphere v1.15.4 instance is internet-accessible.
  • Review application logs for unauthenticated upload activity.
  • Inspect upload directories for unexpected executable or scheduled-task files.
  • Check vendor guidance for confirmed remediation status.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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.

description · low confidence lookup

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 lookup
cve · low confidence lookup

CVE-2021-45790 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.