vBulletin - Open Redirect

mediumseverity

6.1CVSS score

3.5%likelihood of exploitation, next 30 days

89%of all CVEs are less likely

Readycheck to confirm it

vBulletin 3.x.x and 4.2.x through 4.2.5 contains an open redirect vulnerability via the redirector.php URL parameter. An attacker can redirect a user to a malicious site and possibly obtain sensitive information, modify data, and/or execute unauthorized operations.

Impact

An attacker can exploit this vulnerability to redirect users to malicious websites, leading to phishing attacks.

Fix

Apply the latest security patches and updates provided by vBulletin to fix the open redirect vulnerability.

How to confirm it

Send: GET {{BaseURL}}/redirector.php?url=https://interact.sh ; GET {{BaseURL}}/redirector.php?do=nodelay&url=https://interact.sh
Positive when: contains "<meta http-equiv=\"refresh\" content=\"0; URL=https://interact…" AND status 200

Run it with nuclei: nuclei -id CVE-2018-6200 -u <target>

The full check

id: CVE-2018-6200

info:
  name: vBulletin - Open Redirect
  author: 0x_Akoko,daffainfo
  severity: medium
  description: |
    vBulletin 3.x.x and 4.2.x through 4.2.5 contains an open redirect vulnerability via the redirector.php URL parameter. An attacker can redirect a user to a malicious site and possibly obtain sensitive information, modify data, and/or execute unauthorized operations.
  impact: |
    An attacker can exploit this vulnerability to redirect users to malicious websites, leading to phishing attacks.
  remediation: |
    Apply the latest security patches and updates provided by vBulletin to fix the open redirect vulnerability.
  reference:
    - https://cxsecurity.com/issue/WLB-2018010251
    - https://nvd.nist.gov/vuln/detail/CVE-2018-6200
    - 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-2018-6200
    cwe-id: CWE-601
    epss-score: 0.03474
    epss-percentile: 0.89192
    cpe: cpe:2.3:a:vbulletin:vbulletin:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: vbulletin
    product: vbulletin
    shodan-query:
      - http.title:"powered by vbulletin"
      - http.html:"powered by vbulletin"
      - http.component:"vbulletin"
      - cpe:"cpe:2.3:a:vbulletin:vbulletin"
    fofa-query:
      - body="powered by vbulletin"
      - title="powered by vbulletin"
    google-query:
      - intext:"powered by vbulletin"
      - intitle:"powered by vbulletin"
  tags: cve,cve2018,redirect,vbulletin,vuln

http:
  - method: GET
    path:
      - '{{BaseURL}}/redirector.php?url=https://interact.sh'
      - '{{BaseURL}}/redirector.php?do=nodelay&url=https://interact.sh'

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '<meta http-equiv="refresh" content="0; URL=https://interact.sh">'

      - type: status
        status:
          - 200

References

Use this check only on systems you are authorised to test. Where the data comes from