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CVE-2021-35397: A path traversal vulnerability in the static router for Drogon from 1.0.0-beta14 to 1.6.0 could allow an un...

A path traversal vulnerability in the static router for Drogon from 1.0.0-beta14 to 1.6.0 could allow an unauthenticated, remote attacker to arbitrarily read files. The vulnerability is due to lack of proper input validation for requested path. An attacker could exploit this vulnerability by sending crafted HTTP request with specific path to read. Successful exploitation could allow the attacker to read files that should be restricted.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2021-35397 affects the Drogon web framework's static file router. In vulnerable versions, a remote unauthenticated requester may read files that should not be public. Business risk depends on whether an internet-facing Drogon service serves static files and whether sensitive files are reachable from that deployment.

Executive priority

Treat as a priority for any public Drogon service. The issue can expose confidential files without authentication, but urgency is lower where Drogon is absent, not public, or static routing is unused.

Technical view

The CVE describes improper path validation in Drogon's static router from 1.0.0-beta14 through 1.6.0, enabling path traversal and arbitrary file read via crafted HTTP requests. The source bundle provides no CVSS score, CWE, confirmed fixed version, or vendor mitigation details.

Likely exposure

Most relevant exposure is internet-facing applications built with Drogon versions 1.0.0-beta14 through 1.6.0 that use the static router or static site feature.

Exploitation context

The CVE states unauthenticated remote exploitation is possible. The bundle does not cite active exploitation, and KEV is false, so active exploitation is not established from these sources.

Researcher notes

Evidence is limited to the CVE description and Drogon references. The record names the vulnerable range and impact, but not a patch version, CVSS vector, CWE, proof of exploitation, or complete affected-product metadata.

Mitigation direction

  • Inventory Drogon applications and identify deployed framework versions.
  • Check upstream Drogon guidance before choosing an upgrade or configuration change.
  • Prioritize moving services off versions 1.0.0-beta14 through 1.6.0.
  • Disable or restrict static file serving where it is not required.
  • Ensure secrets and configuration files are outside any served file tree.

Validation and detection

  • Confirm whether each Drogon service uses the static router or static site feature.
  • Verify deployed Drogon versions against the affected range.
  • Review public routes for unintended static file exposure.
  • Inspect logs for suspicious traversal-style path requests.
  • Check whether sensitive files exist near static content roots.
Prepared
Confidence
medium
Sources
6

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.

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-2021-35397 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
5Source 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
n/an/an/aListed
Weakness

CWE details

No CWE listed

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