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CVE Record

CVE-2017-16089: serverlyr is a simple http server.

serverlyr is a simple http server. serverlyr 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-2017-16089 affects the serverlyr Node module, a simple HTTP server. The reported issue allows directory traversal, meaning a remote user may access files outside the intended served directory by manipulating the URL path. Business risk depends on whether serverlyr is deployed and reachable.

Executive priority

Prioritize if serverlyr is deployed in production or exposed externally. The impact can include unauthorized file disclosure, but urgency is lower where the package is absent or isolated.

Technical view

serverlyr is reported vulnerable to CWE-22 path traversal across all versions. The CVE description says crafted URL path components can give access to the filesystem. The bundle does not provide CVSS scoring, a named fixed version, or vendor mitigation details.

Likely exposure

Exposure is likely limited to applications that install and run the serverlyr Node module, especially if its HTTP server is reachable from untrusted networks or serves local files.

Exploitation context

The source bundle includes a public proof-of-concept reference, but KEV is false and no cited source states active exploitation. Treat exploit availability as public research evidence, not confirmed in-the-wild activity.

Researcher notes

Evidence is concise but clear on vulnerability class and affected scope: all versions of serverlyr. Missing data includes CVSS, fixed version, maintainer advisory details, and confirmed exploitation telemetry.

Mitigation direction

  • Inventory applications for the serverlyr Node module.
  • Remove serverlyr from internet-facing services where possible.
  • Replace serverlyr with a maintained HTTP/static-file serving component.
  • Restrict access to any remaining serverlyr deployment.
  • Check vendor or package guidance before assuming a patched version exists.

Validation and detection

  • Search dependency manifests and lockfiles for serverlyr.
  • Confirm no public route is backed by serverlyr.
  • Review deployments for services exposing local filesystem content.
  • Check application logs for path traversal probes.
  • Verify replacement components confine requests to the document root.
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.

Open ATT&CK lookup
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-2017-16089 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
HackerOneserverlyr 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.