AS-2026-024: Plex Media Server (Plex2Shell)

2026-11-09

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Statement

ASUSTOR has released Plex Media Server app in ADM to resolve the Plex2Shell vulnerabilities: CVE-2026-96652, CVE-2026-96654, CVE-2026-96655 and CVE-2026-96656.

Affected Products

Product	Severity	Fixed Release Availability
ADM 5.0 and 5.1	Important	Upgrade Plex Media Server to 1.43.3.10861 (Released on 2026/8/5) or above.
ADM 4.3, 4.2 and 4.1	Important	Upgrade Plex Media Server to 1.43.3.10861 (Released on 2026/8/5) or above.

Detail

• CVE-2026-96652
  • Severity: Medium
  • CVSS4 Base Score: 5.3
  • CVSS4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
  • Plex Media Server before 1.43.3.10861 allows SSRF via '/player/timeline'. An attacker using any X-Plex-Token value can include a full URL in the 'protocol' parameter and force the Plex server to POST to the attacker's chosen destination.
• CVE-2026-96654
  • Severity: Medium
  • CVSS4 Base Score: 6.9
  • CVSS4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  • 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.
• CVE-2026-96655
  • Severity: Medium
  • CVSS4 Base Score: 5.3
  • CVSS4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
  • Plex Media Server before 1.43.3.10861 allows an authenticated user to request arbitrary internal or external addresses via the '/video/:/transcode/universal' path parameter.
• CVE-2026-96656
  • Severity: High
  • CVSS4 Base Score: 8.6
  • CVSS4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  • Plex Media Server before 1.43.3.10861 allows an admin user to write arbitrary files that may be executed on load. The preference TranscoderH264Options is appended verbatim to x264's option string on every transcode. At startup, all .so files are run without signature, execute bit, or symbol checks.

Reference

• CVE-2026-96652
• CVE-2026-96654
• CVE-2026-96655
• CVE-2026-96656
• KEV Catalog on CISA

Revision

Revision	Date	Description
1	2026-11-09	Initial public release.