Security readout for executives and security teams
Plain-English summary
CVE-2017-16155 affects the fast-http-cli Node module, a command-line interface for a simple web server. The reported issue allows directory traversal through crafted URLs, which can expose files outside the intended web directory. Business risk depends on whether this tool is installed and reachable by untrusted users.
Executive priority
Prioritize review if the tool is used in production, developer environments reachable from shared networks, or any internet-facing context. If it is only an unused dependency, handle through normal dependency cleanup.
Technical view
The CVE describes CWE-22 path traversal in fast-http-cli. All listed versions are affected. A remote requester may use URL path traversal to access filesystem content outside the intended served path. The sources do not provide CVSS scoring, a fixed version, or vendor mitigation details.
Likely exposure
Exposure is most likely where fast-http-cli is installed and used to serve files on a network reachable by untrusted users. Systems with the package installed but not running a service have lower immediate exposure.
Exploitation context
The CVE source bundle does not identify active exploitation, and the record is not in CISA KEV. Public references include a proof-of-concept repository, so security teams should treat internet-facing or shared-network use as unsafe until assessed.
Researcher notes
Evidence is limited to the CVE description and public references. The record lists all versions affected but gives no CVSS vector, fixed release, or detailed remediation. Avoid assuming exploit prevalence beyond the public proof-of-concept reference.
Mitigation direction
- Check vendor or npm advisory guidance for any available replacement or fix.
- Remove fast-http-cli where it is not required.
- Avoid exposing fast-http-cli services to untrusted networks.
- Run any temporary service with least-privilege filesystem access.
- Replace it with a maintained file server if ongoing use is needed.
Validation and detection
- Inventory package manifests and deployed hosts for fast-http-cli.
- Confirm whether any fast-http-cli process is currently running.
- Identify listening interfaces and whether untrusted users can reach them.
- Review served directories and filesystem permissions for sensitive files.
- Document compensating controls if removal is not immediately possible.
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-2017-16155 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/JacksonGL/NPM-Vuln-PoC/tree/master/directory-traversal/fast-http-cliCVE reference · x_refsource_MISC
- https://nodesecurity.io/advisories/383CVE 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.
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.