Plex: >> Media Server >> 1.21 Security Vulnerabilities
Plex Media Server before 1.43.3.10861 builds a file path from the url parameter without checking it for ../ sequences, allowing path traversal via '/system/agents/media/get'. A remote attacker with a valid session token could read any file that the target user can access. This access includes the PlexOnlineToken, which grants control of the Plex account and server. A LAN-adjacent attacker with a client-supplied X-Forwarded-For header could exploit the same issue.
CVSS Score
7.1
EPSS Score
0.008
Published
2026-09-23
CVE-2026-96652
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.
Known exploited
CVSS Score
5.3
EPSS Score
0.119
Published
2026-09-23
CVE-2026-96654
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.
Known exploited
CVSS Score
6.9
EPSS Score
0.019
Published
2026-09-23
CVE-2026-96655
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.
Known exploited
CVSS Score
5.3
EPSS Score
0.107
Published
2026-09-23
CVE-2026-96656
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.
Known exploited
CVSS Score
8.6
EPSS Score
0.018
Published
2026-09-23
In the plex.tv backend for Plex Media Server (PMS) through 2025-12-31, a non-server device token can retrieve other tokens (intended for unrelated access) via clients.plex.tv/devices.xml.
CVSS Score
5.0
EPSS Score
0.003
Published
2026-01-02
In the plex.tv backend for Plex Media Server (PMS) through 2025-12-31, a non-server device token can retrieve share tokens (intended for unrelated access) via a shared_servers endpoint.
CVSS Score
5.0
EPSS Score
0.003
Published
2026-01-02
Plex Media Server (PMS) through 1.42.2.10156 allows retrieval of a permanent access token via a /myplex/account call with a transient access token.
CVSS Score
8.5
EPSS Score
0.003
Published
2026-01-02
In Plex Media Server (PMS) through 1.42.2.10156, ability to access /myplex/account with a device token is not properly aligned with whether the device is currently associated with an account.
CVSS Score
7.1
EPSS Score
0.003
Published
2026-01-02
Plex media server 1.21 and before is vulnerable to ddos reflection attack via plex service.
CVSS Score
7.5
EPSS Score
0.15
Published
2023-01-18
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