Security readout for executives and security teams
Plain-English summary
CVE-2021-43741 describes a CMSimple 5.4 issue where directory traversal around config.php filename handling may lead to remote code execution. The public CVE data is sparse: no CVSS score, CWE, CPE, or vendor-fixed version is provided.
Executive priority
Prioritize quickly if CMSimple 5.4 is exposed to the internet or used for business-critical content. If absent, document non-exposure and monitor only for legacy asset drift.
Technical view
The source description says CMSimple 5.4 allows directory traversal when a user changes a file name to a malicious file on config.php, leading to remote code execution. The record does not define prerequisites, affected CPEs, exploit maturity, or remediation details.
Likely exposure
Exposure is most likely limited to organizations still running CMSimple 5.4, especially public-facing deployments or installations where configuration management is reachable by untrusted users.
Exploitation context
The provided bundle does not show CISA KEV listing or active exploitation. Public references are GitHub repositories discussing the vulnerability, but the bundle does not prove exploitation in the wild.
Researcher notes
Confidence is constrained by sparse CVE metadata. The key claim is directory traversal leading to remote code execution, but the bundle lacks CVSS, CWE, CPE, prerequisites, patch status, and independent exploitation evidence.
Mitigation direction
- Inventory CMSimple deployments and confirm whether version 5.4 is present.
- Check CMSimple or maintainer guidance for a fixed version or supported workaround.
- Restrict access to CMSimple administrative and configuration areas.
- Review configuration file permissions and deployment ownership boundaries.
- Consider retiring or replacing unsupported CMSimple 5.4 instances.
Validation and detection
- Identify all internet-facing sites using CMSimple.
- Confirm exact CMSimple version from deployment records or application files.
- Review whether config.php can be changed by untrusted or low-privileged users.
- Check web and application logs for unusual configuration file changes.
- Track vendor or project advisories for confirmed remediation details.
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 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-2021-43741 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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/iiSiLvEr/CMSimple5.4-VulnerabilitiesCVE reference · x_refsource_MISC
- https://github.com/iiSiLvEr/CVEs/tree/main/CVE-2021-43741CVE reference · x_refsource_MISC
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.