by Kastro
Paper/Archive/CVE-2026-67394

CVE-2026-67394

WebPros Plesk — A critical local privilege escalation via OS command injection vulnerability has been discovered in Plesk for Linux, affecting all versio…

EPSS 1%CVSS 9.0
critical.is priorityof 100
41
CVSS 9.0 (CNA)9.0 / 10 × 3027.0Not in CISA KEV+300.0EPSS percentile 70.2.702 × 2014.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

A critical local privilege escalation via OS command injection vulnerability has been discovered in Plesk for Linux, affecting all versions from 18.0.34 before 18.0.79.9 and 18.0.80.5. The vulnerability allows a customer or reseller with shell access (or allowed to change their own shell access) to elevate privileges to the root account on the hosting server.

Affected

ProductAffectedFixed inSource
Plesk18.0.34 – < 18.0.79.918.0.79.9CNA
Plesk18.0.80 – < 18.0.80.518.0.80.5CNA

Scores by source

hackerone (CNA)9.0CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refsupport.plesk.com/hc/en-us/articles/42968165026967-CVE-2026-67394-Vulnerability-in-Plesk-allows-privilege-escalation-to-root