SECURELYN

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.

Scores

5.3
CVSS 5.3 out of 10, medium severity.
0.2%
EPSS 0.2% chance of exploitation in the next 30 days.

The facts

Published
23 September 2026
Last changed
20 October 2026
NVD status
Modified
Severity
Medium, CVSS 5.3 out of 10 (version 4.0)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R…
Weakness
Affects
  • plex media server
Known exploited
Yes. CISA added it to the Known Exploited Vulnerabilities catalogue on 20 October 2026.
EPSS
0.2% chance of exploitation activity in the next 30 days (percentile 12).

Is there a Securelyn advisory?

Not yet. Securelyn writes plain-English advisories for the flaws that matter most to businesses. Subscribe to the digest to hear about them.

References