Plex vulnerabilities
We track 7 vulnerabilities in Plex products. 4 are rated high or critical, and 5 have been exploited in real attacks. The most recent was published on September 23, 2026.
Latest Plex vulnerabilities
- 7.2 High severity
Plex Media Server External Control of File Name or Path Exploited
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 si
- 4.3 Medium severity
Plex Media Server Server-Side Request Forgery (SSRF) Exploited
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.
- 6.5 Medium severity
Plex Media Server Improper Neutralization of Encoded URI Schemes in a Web Page Exploited
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.
- 4.3 Medium severity
Plex Media Server Server-Side Request Forgery (SSRF) Exploited
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.
- 7.1 High severity
Media Server: Operation on a Resource after Expiration or Release
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.
- 8.5 High severity
Media Server: Incorrect Resource Transfer Between Spheres
Plex Media Server (PMS) 1.41.7.x through 1.42.0.x before 1.42.1 is affected by incorrect resource transfer between spheres because /myplex/account provides the credentials of the server owner (and a /api/resources call reveals other servers accessible by that
- 7.2 High severity
Plex Media Server Remote Code Execution Exploited
Deserialization of Untrusted Data in Plex Media Server on Windows allows a remote, authenticated attacker to execute arbitrary Python code.