What is CVE-2018-20813?

CVE-2018-20813 is a critical-severity vulnerability in Ivanti Connect Secure, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2019-06-28.

How severe is CVE-2018-20813?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Improper input validation in Ivanti Connect Secure

CVE-2018-20813

An input validation issue has been found with login_meeting.cgi in Pulse Secure Pulse Connect Secure 8.3RX before 8.3R2.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2019-06-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.031 (87.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000

Affected products

Ivanti Connect Secure — versions 8.3

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA43877/ (Vendor Advisory)

Frequently asked questions

What is CVE-2018-20813?: CVE-2018-20813 is a critical-severity vulnerability in Ivanti Connect Secure, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2019-06-28.
How severe is CVE-2018-20813?: Critical severity. CVSS v3 base score is 9.8 out of 10.