Security readout for executives and security teams
Plain-English summary
CVE-2020-20067 is a high-severity file upload weakness reported in ebCMS v1.1.0. A low-privileged remote user could abuse the upload type parameter to upload content that may execute arbitrary code. For an exposed ebCMS deployment, this could lead to full compromise of site data, integrity, and availability.
Executive priority
Treat this as a priority remediation item for any confirmed ebCMS v1.1.0 deployment, especially if upload features are reachable from the internet or broad user groups. If ebCMS is not present, document non-exposure and monitor for clearer vendor guidance.
Technical view
The CVE describes CWE-434 in ebCMS v1.1.0, with CVSS 3.1 score 8.8: network reachable, low complexity, low privileges, no user interaction, and high confidentiality, integrity, and availability impact. The provided sources do not identify a patched version, specific vendor advisory, or detailed affected CPEs.
Likely exposure
Exposure appears limited to organizations running ebCMS v1.1.0 or closely derived code with the vulnerable upload handling reachable by authenticated low-privilege users. The CVE metadata lists affected vendor/product as n/a, so asset confirmation is required before assuming exposure.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. A public GitHub issue is referenced, so technical details may be publicly discoverable, but this analysis does not rely on exploit availability.
Researcher notes
Evidence is sparse: the CVE record gives the vulnerable version, upload type parameter, CWE-434, and CVSS vector, but not a patch, advisory, CPE, or exploitation confirmation. Validate exposure from installed code and configuration rather than metadata alone.
Mitigation direction
- Check the ebCMS project or maintainer guidance for any fixed release or configuration advice.
- Restrict upload functionality to trusted roles until exposure is understood.
- Disable execution from upload storage paths where operationally feasible.
- Apply strict server-side file type and content validation for uploads.
- Consider upgrading or replacing ebCMS v1.1.0 if no maintained fix exists.
Validation and detection
- Inventory internet-facing and internal systems for ebCMS v1.1.0.
- Confirm which authenticated roles can reach upload functionality.
- Review upload directories for unexpected executable content.
- Review application and web server logs for suspicious upload activity.
- Verify upload storage paths cannot execute server-side code.
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.
CWE-434: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupFile 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-2020-20067 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
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/a932278490/ebcms/issues/1CVE reference
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.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.