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CVE Record

CVE-2017-16093: cyber-js is a simple http server.

cyber-js is a simple http server. A cyberjs server is vulnerable to a directory traversal issue, giving an attacker access to the filesystem by placing "../" in the url.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2017-16093 affects the cyber-js Node module, a simple HTTP server. The reported issue lets a remote requester use path traversal in a URL to access files outside the intended web directory. Sources list all versions as affected, but provide no CVSS score or named patch.

Executive priority

Prioritize if cyber-js is deployed in any exposed service, because the reported impact is unauthorized filesystem access. If cyber-js is only historical or unused, handle through dependency cleanup and evidence-based closure.

Technical view

The vulnerability is classified as CWE-22 path traversal. cyber-js appears to insufficiently constrain requested paths before reading from the filesystem, allowing directory escape through crafted URL path input. The source bundle identifies HackerOne/cyber-js node module, all versions, with advisory and PoC references.

Likely exposure

Exposure is likely limited to systems that run the cyber-js package as an HTTP server, especially if reachable from untrusted networks. Dependency-only presence without a running server is lower immediate risk, but still warrants inventory review.

Exploitation context

The source bundle includes a public PoC repository and an advisory reference. It does not show CISA KEV listing, active exploitation, CVSS scoring, authentication requirements, or patch availability. Treat internet-exposed instances as urgent until ruled out.

Researcher notes

Evidence is sparse: all versions are listed affected, severity is unknown, and no fix is identified in the bundle. Validation should focus on confirming runtime use, exposure boundary, and whether the server can access sensitive files.

Mitigation direction

  • Inventory package manifests and runtime services for cyber-js usage.
  • Remove cyber-js from production paths where feasible.
  • Restrict network access to any cyber-js server during assessment.
  • Check the advisory or maintainer guidance; sources do not name a patch.
  • Run the service with least filesystem privilege and isolated content roots.

Validation and detection

  • Search dependency manifests and lockfiles for cyber-js.
  • Confirm whether any cyber-js server is actually running.
  • Identify whether the service is reachable from untrusted networks.
  • Review server file-access boundaries and runtime filesystem permissions.
  • Document compensating controls if immediate removal is not possible.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · medium confidence lookup

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.

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description · low confidence lookup

File 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 lookup
cve · low confidence lookup

CVE-2017-16093 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
HackerOnecyber-js node moduleAll versionsListed
Weakness

CWE details

CWE-22

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.