CVE-2023-6675: Malicious File Upload in National Keep's CyberMath
Unrestricted Upload of File with Dangerous Type vulnerability in National Keep Cyber Security Services CyberMath allows Upload a Web Shell to a Web Server.
This issue affects CyberMath: from v.1.4 before v.1.5.
Security readout for executives and security teams
Plain-English summary
CVE-2023-6675 is a critical file-upload flaw in National Keep CyberMath v1.4. An unauthenticated remote attacker could upload a dangerous file, such as a web shell, to the server. If CyberMath is internet-facing, this could lead to full compromise of confidentiality, integrity, and availability.
Executive priority
Prioritize remediation for any internet-facing CyberMath v1.4 deployment. The business risk is potential server takeover through unauthenticated file upload. If the product is not used, document non-exposure and monitor for updated vendor or government advisories.
Technical view
The issue is CWE-434: unrestricted upload of a file with dangerous type. The CVSS 3.1 score is 9.8 with network attack vector, low complexity, no privileges, and no user interaction. Sources state CyberMath is affected from v1.4 before v1.5.
Likely exposure
Exposure is limited to organizations running National Keep CyberMath v1.4, especially if reachable from untrusted networks. Systems on v1.5 or later are not listed as affected in the provided CVE data. Confirm product deployment and version before prioritizing remediation.
Exploitation context
The vulnerability could permit web shell upload to a web server, enabling server-side control. The source bundle does not show CISA KEV listing or other cited evidence of active exploitation. Treat as urgent due to unauthenticated remote attack conditions and potential full impact.
Researcher notes
Public data is concise and does not provide exploit details, indicators, or a detailed fix procedure. One listed USOM reference is marked broken in the bundle; the siberguvenlik.gov.tr advisory remains cited. Avoid assuming affected versions beyond v1.4 before v1.5.
Mitigation direction
Upgrade CyberMath from v1.4 to v1.5 or later, if available and vendor-approved.
Review National Keep or government advisory guidance for official remediation instructions.
Restrict public access to CyberMath until remediation is complete.
Limit upload functionality to trusted users and trusted networks where feasible.
Inspect servers for unexpected uploaded executable files or web shells.
Validation and detection
Inventory CyberMath instances and confirm exact version numbers.
Identify whether any CyberMath instance is internet-facing.
Review upload directories for dangerous file types or unexpected scripts.
Check web server logs for suspicious upload and access patterns.
Confirm remediation by verifying CyberMath is no longer v1.4.
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.
cwe · medium confidence lookup
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.
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.
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.
1CVSS vectors
3Timeline events
2ADP providers
3Source links
SSVC decision data
CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: total
CVSS vector scores
1 official score
We 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.
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
CWE-434 · source CWE mapping
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.