Security readout for executives and security teams
Plain-English summary
Older Next.js applications before version 2.4.1 could allow directory traversal through public asset URL areas. In plain terms, an attacker might retrieve files the site did not intend to publish, creating sensitive information disclosure risk.
Executive priority
Prioritize remediation for internet-facing legacy Next.js sites, especially where secrets, configuration files, or source files may be present on the server. The issue is old but still relevant if obsolete deployments remain online.
Technical view
CVE-2017-16877 describes directory traversal in ZEIT Next.js before 2.4.1 under the /_next and /static request namespaces. The provided sources identify the issue as sensitive information disclosure and reference the 2.4.1 release and fixing commit.
Likely exposure
Exposure is most likely limited to legacy Next.js deployments older than 2.4.1 that still serve requests under /_next or /static. The CVE bundle’s affected-product metadata is incomplete and lists vendor and product as n/a.
Exploitation context
The source bundle does not show CISA KEV listing, exploit reports, or active exploitation evidence. Treat exploitation status as unconfirmed, while recognizing that directory traversal bugs can become serious if secrets or application files are exposed.
Researcher notes
The bundle provides a concise CVE description, a release reference, and a fixing commit, but no CVSS, CWE, exploitability details, or complete affected CPE data. Avoid expanding scope beyond Next.js before 2.4.1 without additional vendor evidence.
Mitigation direction
- Identify any deployed Next.js versions older than 2.4.1.
- Upgrade affected applications to Next.js 2.4.1 or later.
- Check vendor release notes and current guidance before relying on compensating controls.
- Reduce public exposure of obsolete deployments until upgraded.
- Rotate secrets if sensitive file access is suspected.
Validation and detection
- Inventory applications using Next.js and record exact versions.
- Confirm whether legacy apps expose /_next or /static routes.
- Review access logs for unusual requests targeting those namespaces.
- Verify remediation by confirming runtime version is 2.4.1 or later.
- Document any affected legacy deployments and owner accountability.
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.
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 lookupCVE-2017-16877 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
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.