---
id: CVE-2017-20284
title: >-
  Caucho Resin contains a path traversal vulnerability in the documentation
  webapp (resin-doc) that allows remote unauthenticated attackers to read
  arbitrary files by supplying a relative path through the inputFile request
  parameter of the…
summary: >-
  Caucho Resin contains a path traversal vulnerability in the documentation
  webapp (resin-doc) that allows remote unauthenticated attackers to read
  arbitrary files by supplying a relative path through the inputFile request
  parameter of the…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-22
vendor: 'Caucho Technology, Inc.'
product: Resin
affected:
  - Resin
published: '2026-09-18'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T20:16:58.540'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2017-20284'
references:
  - url: 'https://blkstone.github.io/2017/10/30/resin-attack-vectors/'
    label: disclosure@vulncheck.com
  - url: 'https://caucho.com/products/resin'
    label: disclosure@vulncheck.com
  - url: >-
      https://raw.githubusercontent.com/projectdiscovery/nuclei-templates/main/http/vulnerabilities/chanjet-tplus/chanjet-crm-sqli.yaml
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/caucho-resin-resin-doc-unauthenticated-path-traversal-via-jndi-appconfig-servlet
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-18T19:46:15.342998Z'
ingestedAt: '2026-09-18T19:49:30.605Z'
epss: 0.00958
epssPercentile: 0.59427
---

## Overview

Caucho Resin contains a path traversal vulnerability in the documentation webapp (resin-doc) that allows remote unauthenticated attackers to read arbitrary files by supplying a relative path through the inputFile request parameter of the jndi-appconfig tutorial servlet. Attackers can craft requests with directory traversal sequences to the servlet endpoint to read files outside the intended tutorial directory on the underlying system. Exploitation evidence was first observed by the Shadowserver Foundation on 2021-12-10.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.