LiveActive security incident?Get immediate response
CVE Record

CVE-2020-21976: An arbitrary file upload in the <input type="file" name="user_image"> component of NewsOne CMS v1.1.0 allow...

An arbitrary file upload in the <input type="file" name="user_image"> component of NewsOne CMS v1.1.0 allows attackers to webshell and execute arbitrary commands.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2020-21976 describes an arbitrary file upload flaw in NewsOne CMS v1.1.0. If reachable, an attacker could place a webshell and run arbitrary commands. The public bundle does not provide CVSS, vendor fix details, authentication requirements, or active exploitation evidence.

Executive priority

Treat internet-facing NewsOne CMS v1.1.0 as urgent because the reported outcome is server command execution. Priority depends on whether the affected upload is reachable and authenticated.

Technical view

The reported vulnerable component is an HTML file upload field named user_image in NewsOne CMS v1.1.0. The CVE description states the flaw permits webshell upload and arbitrary command execution. No CWE, CPE, CVSS vector, patch version, or exploit preconditions are provided in the supplied sources.

Likely exposure

Likely exposure is deployments running NewsOne CMS v1.1.0 with the user_image upload path reachable. The source bundle does not establish whether authentication is required, whether other versions are affected, or how commonly the CMS is deployed.

Exploitation context

A public CXSecurity reference is listed, and the CVE text describes webshell upload and command execution. The CVE is not in KEV, and the supplied sources do not show confirmed active exploitation.

Researcher notes

Evidence is thin but serious: the CVE record and referenced advisory identify arbitrary file upload leading to webshell and command execution. Missing data includes CVSS, CWE, CPE, affected-version range, authentication context, and fixed version.

Mitigation direction

  • Identify any NewsOne CMS deployments and confirm whether v1.1.0 is present.
  • Check vendor or project guidance for a fixed release or official mitigation.
  • Restrict access to the affected upload function until remediation is confirmed.
  • Disable the upload path if it is not business-critical.
  • Review uploaded files and remove unauthorized executable content through incident response procedures.

Validation and detection

  • Confirm the application version and whether NewsOne CMS v1.1.0 is running.
  • Locate any user_image upload workflow and determine who can access it.
  • Verify uploads are not stored in executable web-served locations.
  • Review web server and application logs for suspicious upload activity.
  • Inspect upload directories for unexpected scripts or recently added files.
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-2020-21976 mapping review

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

Open ATT&CK lookup
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.