CVE-2018-13415: Plex Media Server

Critical severity, CVSS 9.8. EPSS: 31.8% chance of exploitation in the next 30 days.

In Plex Media Server 1.13.2.5154, the XML parsing engine for SSDP/UPnP functionality is vulnerable to an XML External Entity Processing (XXE) attack. Remote, unauthenticated attackers can use this vulnerability to: (1) Access arbitrary files from the filesystem with the same permission as the user account running Plex, (2) Initiate SMB connections to capture a NetNTLM challenge/response and crack to cleartext password, or (3) Initiate SMB connections to relay a NetNTLM challenge/response and achieve Remote Command Execution in Windows domains.

Affected products

• Plex Media Server: version 1.13.2.5154 only

Published 2018-08-13. Last modified 2026-06-17.