CVE-2018-6320

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-09-06 · updated 2026-06-17
Weakness: CWE-20

Description

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 (Pulse Secure): 8.1
Ivanti Connect Secure (Pulse Secure): 8.1r1.0, 8.1rx, 8.3rx
Pulsesecure Pulse Policy Secure: 5.2r1.0, 5.2r2.0, 5.2r3.0, 5.2r3.2, 5.2r4.0, 5.2r5.0 (+8)

References

https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA43877
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA43877

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