---
id: CVE-2021-40639
title: >-
  Improper access control in Jfinal CMS 5.1.0 allows attackers to access
  sensitive information via
  /classes/conf/db.properties&config=filemanager.config.js.
summary: >-
  Improper access control in Jfinal CMS 5.1.0 allows attackers to access
  sensitive information via
  /classes/conf/db.properties&config=filemanager.config.js.
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-668
  - CWE-863
vendor: jflyfox
product: jfinal_cms
affected:
  - jfinal_cms = 5.1.0
published: '2021-09-15'
updated: '2026-07-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-40639'
references:
  - url: 'https://github.com/jflyfox/jfinal_cms'
    label: cve@mitre.org
  - url: 'https://github.com/jflyfox/jfinal_cms/issues/27'
    label: cve@mitre.org
  - url: 'http://jfinalcms.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/jflyfox/jfinal_cms'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/jflyfox/jfinal_cms/issues/27'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.01198
epssPercentile: 0.66881
ingestedAt: '2026-07-06T17:03:23.571Z'
---

## Overview

Improper access control in Jfinal CMS 5.1.0 allows attackers to access sensitive information via /classes/conf/db.properties&config=filemanager.config.js.

## Affected

- `jfinal_cms = 5.1.0`

## Remediation

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