Security readout for executives and security teams
Plain-English summary
CVE-2017-16156 affects the myprolyz Node.js static file server. Sources say directory traversal in URLs can let an attacker access files outside the intended web directory. Business risk depends on whether this package is deployed in any reachable service and what files the server can read.
Executive priority
Prioritize if myprolyz is present in any production or exposed service. The available evidence lacks scoring, but the described impact is direct filesystem exposure, which can create credential, source code, or configuration disclosure risk.
Technical view
The issue is CWE-22 path traversal in the myprolyz node module, listed as affecting all versions. The described flaw accepts parent-directory sequences in a URL, allowing filesystem access beyond the static file root. No CVSS score, fixed version, or vendor mitigation is provided in the source bundle.
Likely exposure
Exposure is likely limited to environments using the myprolyz Node module as a static file server, especially internet-facing or internal web services with sensitive local files readable by the process.
Exploitation context
The CVE record does not indicate active exploitation, and KEV is false. A public proof-of-concept repository is referenced, so defenders should treat validation as time-sensitive without assuming exploitation in the wild.
Researcher notes
Evidence is sparse: affected scope is all versions of the myprolyz node module, with CWE-22 and public PoC reference. The bundle does not name a patched version, exploitation in the wild, or precise vulnerable code path beyond traversal through URL handling.
Mitigation direction
- Inventory applications and lockfiles for the myprolyz package.
- Remove or replace myprolyz where feasible, especially on reachable services.
- Check current vendor or package advisory guidance for any fixed release.
- Restrict network exposure for any remaining myprolyz deployments.
- Run the service with least-privilege filesystem access.
Validation and detection
- Search dependency manifests and SBOMs for myprolyz.
- Confirm whether any matching service serves static files in production.
- Review web access logs for path traversal indicators in URLs.
- Check process permissions and readable sensitive file locations.
- Verify dependency scanners flag CVE-2017-16156 where present.
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-2017-16156 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/386CVE reference · x_refsource_MISC
- https://github.com/JacksonGL/NPM-Vuln-PoC/tree/master/directory-traversal/myprolyzCVE 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.