CVE-2015-6589: Kaseya Virtual System Administrator

High severity, CVSS 8.8. EPSS: 13.6% chance of exploitation in the next 30 days.

Directory traversal vulnerability in Kaseya Virtual System Administrator (VSA) 7.0.0.0 before 7.0.0.33, 8..0.0.0 before 8.0.0.23, 9.0.0.0 before 9.0.0.19, and 9.1.0.0 before 9.1.0.9 allows remote authenticated users to write to and execute arbitrary files due to insufficient restrictions in file paths to json.ashx.

Affected products

• Kaseya Virtual System Administrator: from 7.0.0.0, before 7.0.0.33 (fixed in 7.0.0.33); from 8.0.0.0, before 8.0.0.23 (fixed in 8.0.0.23); from 9.0.0.0, before 9.0.0.19 (fixed in 9.0.0.19); from 9.1.0.0, before 9.1.0.9 (fixed in 9.1.0.9)

Published 2020-02-13. Last modified 2026-06-17.