CVE-2018-6320: Ivanti Connect Secure

Critical severity, CVSS 9.8. EPSS: 4.1% chance of exploitation in the next 30 days.

A vulnerability has been discovered in login.cgi in Pulse Secure Pulse Connect Secure (PCS) 8.1RX before 8.1R12 and 8.3RX before 8.3R2 and Pulse Policy Secure (PPS) 5.2RX before 5.2R9 and 5.4RX before 5.4R2 wherein an http(s) Host header received from the browser is trusted without validation.

Affected products

• Ivanti Connect Secure: version 8.1 only
• Pulse Secure Pulse Connect Secure: version 8.1r1.0 only; version 8.1rx only; version 8.3rx only
• Pulse Secure Pulse Policy Secure: version 5.2r1.0 only; version 5.2r2.0 only; version 5.2r3.0 only; version 5.2r3.2 only; version 5.2r4.0 only; version 5.2r5.0 only; …

Published 2018-09-06. Last modified 2026-06-17.