WordPress Toolbar <= 2.2.6 - Open Redirect

mediumseverity

6.1CVSS score

26.8%likelihood of exploitation, next 30 days

98%of all CVEs are less likely

Readycheck to confirm it

The plugin redirects to any URL via the "wptbto" parameter. This makes it possible for unauthenticated attackers to redirect users to potentially malicious sites if they can successfully trick them into performing an action.

Impact

Unauthenticated attackers can redirect users to malicious external sites via the wptbto parameter, potentially facilitating phishing attacks or credential theft.

Fix

Update WordPress Toolbar plugin to version 2.2.7 or later.

How to confirm it

Send: GET {{BaseURL}}/wp-content/plugins/wordpress-toolbar/toolbar.php?wptbto=https://oast.me&wptbhash=acme
Positive when: matches in header /(?m)^(?:Location\s*?:\s*?)(?:https?://|//)?(?:[a-zA-Z0-9\-_\.@]*)oast\.me.*$/

Run it with nuclei: nuclei -id CVE-2023-6389 -u <target>

The full check

id: CVE-2023-6389

info:
  name: WordPress Toolbar <= 2.2.6 - Open Redirect
  author: s4e-io
  severity: medium
  description: |
    The plugin redirects to any URL via the "wptbto" parameter. This makes it possible for unauthenticated attackers to redirect users to potentially malicious sites if they can successfully trick them into performing an action.
  impact: |
    Unauthenticated attackers can redirect users to malicious external sites via the wptbto parameter, potentially facilitating phishing attacks or credential theft.
  remediation: |
    Update WordPress Toolbar plugin to version 2.2.7 or later.
  reference:
    - https://wpscan.com/vulnerability/04dafc55-3a8d-4dd2-96da-7a8b100e5a81/
    - https://nvd.nist.gov/vuln/detail/CVE-2023-6389
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2023-6389
    cwe-id: CWE-601
    epss-score: 0.26798
    epss-percentile: 0.98046
    cpe: cpe:2.3:a:abhinavsingh:wordpress_toolbar:*:*:*:*:*:*:wordpress:*
  metadata:
    verified: true
    max-request: 1
    vendor: abhinavsingh
    product: wordpress_toolbar
    shodan-query: http.html:/wp-content/plugins/wordpress-toolbar/
    fofa-query: body=/wp-content/plugins/wordpress-toolbar/
    publicwww-query: "/wp-content/plugins/wordpress-toolbar/"
  tags: wpscan,cve,cve2023,wordpress,wp-plugin,wordpress-toolbar,wp,redirect,abhinavsingh,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/wp-content/plugins/wordpress-toolbar/toolbar.php?wptbto=https://oast.me&wptbhash=acme"

    matchers:
      - type: regex
        part: header
        regex:
          - '(?m)^(?:Location\s*?:\s*?)(?:https?://|//)?(?:[a-zA-Z0-9\-_\.@]*)oast\.me.*$'

References

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