What is CVE-2018-20811?

CVE-2018-20811 is a medium-severity vulnerability in Ivanti Connect Secure, classified under Information Disclosure. CVSS score: 5.3/10. Published 2019-06-28.

How severe is CVE-2018-20811?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in Ivanti Connect Secure

CVE-2018-20811

A hidden RPC service issue was found with Pulse Secure Pulse Connect Secure 8.3RX before 8.3R2 and 8.1RX before 8.1R12.

Vulnerability class: Information Disclosure

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

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.021 (81.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000

Affected products

Ivanti Connect Secure — versions 8.1, 8.3

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

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

Frequently asked questions

What is CVE-2018-20811?: CVE-2018-20811 is a medium-severity vulnerability in Ivanti Connect Secure, classified under Information Disclosure. CVSS score: 5.3/10. Published 2019-06-28.
How severe is CVE-2018-20811?: Medium severity. CVSS v3 base score is 5.3 out of 10.