Security readout for executives and security teams
Plain-English summary
This issue affects CheckMK Raw Edition 1.5.0 through 1.6.0 when its default Dokuwiki component is misconfigured to allow embedded PHP. An attacker who already has administrator access to the web management console, or has hijacked an administrator session, could achieve remote code execution.
Executive priority
Prioritize systems where the CheckMK management console is internet-facing or broadly reachable. The issue can lead to code execution, but the known prerequisite is administrator access or session compromise.
Technical view
The source describes a web management console flaw tied to Dokuwiki, installed by default in CheckMK Raw Edition. The risky condition is configuration that permits embedded PHP code, creating an RCE path. Exploitation is gated by authenticated administrator-level access or a hijacked administrator session.
Likely exposure
Exposure is most likely where CheckMK Raw Edition 1.5.0 to 1.6.0 remains deployed and its web management interface is reachable by administrators or exposed beyond tightly controlled networks.
Exploitation context
The provided sources do not show CISA KEV listing, public active exploitation, CVSS, or detailed vendor remediation. The cited GitHub reference may contain public technical detail, so treat exposed admin consoles as higher risk.
Researcher notes
Evidence is limited: the CVE description names CheckMK Raw Edition 1.5.0 to 1.6.0 and Dokuwiki embedded PHP misconfiguration. The structured affected field is not populated, and no CVSS, CWE, KEV status, or vendor advisory is included.
Mitigation direction
- Identify any CheckMK Raw Edition 1.5.0 through 1.6.0 deployments.
- Check vendor guidance for fixed versions or supported remediation.
- Restrict management console access to trusted administrative networks.
- Review Dokuwiki configuration for embedded PHP exposure.
- Reset suspicious administrator sessions and strengthen admin access controls.
Validation and detection
- Confirm deployed CheckMK Raw Edition versions against the affected range.
- Verify whether Dokuwiki is installed and enabled by default.
- Review management console reachability from untrusted networks.
- Check admin access logs for unexpected sessions or configuration changes.
- Confirm remediation status against current vendor guidance.
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.
Execution 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 lookupCVE-2021-40904 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.
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/Edgarloyola/CVE-2021-40904CVE reference, mitre
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.