Security readout for executives and security teams
Plain-English summary
CVE-2017-16219 affects the yttivy Node.js static file server. The package can allow directory traversal, meaning a remote requester may be able to read files outside the intended web directory. Business urgency depends on whether yttivy is deployed in internet-facing or sensitive internal applications.
Executive priority
Prioritize confirmation of exposure. If yttivy is internet-facing or near sensitive files, treat replacement or removal as a near-term remediation task. If absent from deployed systems, no further action is needed beyond dependency monitoring.
Technical view
The record describes CWE-22 path traversal in all versions of the yttivy node module. By placing parent-directory sequences in a URL, an attacker may access filesystem paths outside the served static directory. The sources do not provide CVSS scoring, a fixed version, or vendor mitigation details.
Likely exposure
Exposure is limited to applications or images that include and actively use yttivy to serve files. Risk is highest where the service is reachable by untrusted users and runs with access to secrets, source code, configuration, or host files.
Exploitation context
The CVE is not listed as KEV in the provided bundle. Public references include an advisory and a proof-of-concept repository, but the bundle does not establish active exploitation in the wild.
Researcher notes
Evidence is sparse: the CVE description names all versions and CWE-22, but no CVSS vector, patch version, or official exploit telemetry is provided. Analysis should focus on dependency presence, runtime reachability, served root boundaries, and process file permissions.
Mitigation direction
- Inventory applications and containers for the yttivy Node module.
- Check vendor or advisory guidance for any maintained replacement or fix.
- Remove or replace yttivy where it serves untrusted HTTP requests.
- Limit filesystem permissions for services that serve static files.
- Avoid exposing affected services publicly until remediation is complete.
Validation and detection
- Review package manifests and lockfiles for yttivy.
- Confirm runtime images do not include yttivy unexpectedly.
- Identify routes or services using yttivy for static file serving.
- Verify only intended directories are readable by the service account.
- Add regression coverage for path traversal rejection.
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-2017-16219 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/441CVE reference · x_refsource_MISC
- https://github.com/JacksonGL/NPM-Vuln-PoC/blob/master/directory-traversal/yttivyCVE 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.