WordPress acf-to-rest-api <=3.1.0 - Insecure Direct Object Reference

highseverity

7.5CVSS score

13.5%likelihood of exploitation, next 30 days

96%of all CVEs are less likely

Readycheck to confirm it

WordPress acf-to-rest-ap through 3.1.0 allows an insecure direct object reference via permalinks manipulation, as demonstrated by a wp-json/acf/v3/options/ request that can read sensitive information in the wp_options table such as the login and pass values.

Impact

An attacker can exploit this vulnerability to access sensitive data, such as user information or administrative credentials.

Fix

Update the acf-to-rest-api plugin to version >3.1.0 or apply the latest security patches.

How to confirm it

Send: GET {{BaseURL}}/wp-json/acf/v3/options/a?id=active&field=plugins
Positive when: contains in header "Content-Type: application/json" AND contains "acf-to-rest-api\\/class-acf-to-rest-api.php" AND status 200

Run it with nuclei: nuclei -id CVE-2020-13700 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2020-13700

info:
  name: WordPress acf-to-rest-api <=3.1.0 - Insecure Direct Object Reference
  author: pikpikcu
  severity: high
  description: |
    WordPress acf-to-rest-ap through 3.1.0 allows an insecure direct object reference via permalinks manipulation, as demonstrated by a wp-json/acf/v3/options/ request that can read sensitive information in the wp_options table such as the login and pass values.
  impact: |
    An attacker can exploit this vulnerability to access sensitive data, such as user information or administrative credentials.
  remediation: |
    Update the acf-to-rest-api plugin to version >3.1.0 or apply the latest security patches.
  reference:
    - https://gist.github.com/mariuszpoplwski/4fbaab7f271bea99c733e3f2a4bafbb5
    - https://wordpress.org/plugins/acf-to-rest-api/#developers
    - https://github.com/airesvsg/acf-to-rest-api
    - https://nvd.nist.gov/vuln/detail/CVE-2020-13700
    - https://github.com/ARPSyndicate/cvemon
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2020-13700
    cwe-id: CWE-639
    epss-score: 0.13463
    epss-percentile: 0.96468
    cpe: cpe:2.3:a:acf_to_rest_api_project:acf_to_rest_api:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 1
    vendor: acf_to_rest_api_project
    product: acf_to_rest_api
    framework: wordpress
  tags: cve,cve2020,wordpress,plugin,acf_to_rest_api_project,vuln

http:
  - method: GET
    path:
      - '{{BaseURL}}/wp-json/acf/v3/options/a?id=active&field=plugins'

    matchers-condition: and
    matchers:
      - type: word
        part: header
        words:
          - 'Content-Type: application/json'

      - type: word
        part: body
        words:
          - 'acf-to-rest-api\/class-acf-to-rest-api.php'
        condition: and

      - type: status
        status:
          - 200

References

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