Security readout for executives and security teams
Plain-English summary
dcserver is a Node.js static file server with a directory traversal flaw. A remote user could request files outside the intended web directory if the package is exposed through an application. The sources identify all versions as affected, but do not provide a CVSS score, fixed version, or vendor mitigation.
Executive priority
Treat as targeted cleanup rather than emergency response unless dcserver is internet-facing. Prioritize confirming usage, removing the package, and reducing file exposure because the sources do not identify a fixed version.
Technical view
CVE-2017-16158 is a CWE-22 directory traversal issue in the dcserver node module. The CVE description says parent-directory path components in a URL can give access to the filesystem beyond the static file root. Evidence is limited to the CVE record and advisories; no patch details are provided in the bundle.
Likely exposure
Exposure is likely only where the dcserver node module is installed and used to serve static files, especially on internet-facing routes. Systems not using this package are not affected based on the provided sources.
Exploitation context
The source bundle includes a public proof-of-concept reference, so the issue was publicly documented. The CVE is not listed as KEV, and the bundle provides no evidence of active exploitation in the wild.
Researcher notes
The affected product is the dcserver node module, listed as all versions. Severity, CVSS, patch availability, and real-world exploitation are not established in the provided evidence. Avoid extrapolating impact beyond filesystem read exposure through directory traversal.
Mitigation direction
- Inventory applications for the dcserver node module.
- Remove or replace dcserver where feasible.
- Avoid exposing dcserver-backed routes to untrusted users.
- Check vendor or package guidance for any maintained replacement path.
- Restrict file permissions around sensitive local files.
Validation and detection
- Search dependency manifests and lockfiles for dcserver.
- Confirm whether any runtime service uses dcserver for static content.
- Map exposed routes that rely on the package.
- Review filesystem permissions for served application hosts.
- Document whether the package is removed, isolated, or still required.
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-22: 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 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-2017-16158 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://nodesecurity.io/advisories/393CVE reference · x_refsource_MISC
- https://github.com/JacksonGL/NPM-Vuln-PoC/blob/master/directory-traversal/tiny-httpCVE 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.