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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Plex Media_Server
cpe:2.3:a:plex:media_server:*:*:*:*:*:*:*:*
|
— |
1.43.0.10861
|
References 4
https://forums.plex.tv/t/plex-media-server/30447/711
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https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026…
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https://www.cve.org/CVERecord?id=CVE-2026-96651
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https://zmain.info/blog/plex2shell
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