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Plex users urged to immediately update due to serious security risk

An analysis of a published proof-of-concept attack chain targeting Plex, developed through extensive AI assistance.

The exploit integrates multiple stages including unauthenticated requests, loopback pivoting, and token theft.

Read about the implications for automated vulnerability research.


The company behind the service did not immediately respond to questions posed to it. However, given that the problem is already being used in real attacks, experts emphasize the need for immediate action.

How to protect your system

Those using the service should make sure they are running version 1.43.3 or later. The app can be configured to install updates automatically, while users also have the option to install them manually.

Additionally, attention to overall system security is recommended. The safest option is to limit access to local networks only, with no contact with the wider internet. If someone chooses to connect their device to the internet, it is a good idea to route traffic through special proxy tools rather than using the default port. Finally, users should only use secure service applications and strong passwords.

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