What is CVE-2019-1020018?

CVE-2019-1020018 is a high-severity vulnerability in Discourse, classified under Improper Authentication. CVSS score: 7.3/10. Published 2019-07-29.

How severe is CVE-2019-1020018?

High severity. CVSS v3 base score is 7.3 out of 10.

Auth bypass in Discourse

CVE-2019-1020018

Discourse before 2.3.0 and 2.4.x before 2.4.0.beta3 lacks a confirmation screen when logging in via an email link.

Vulnerability class: Broken Authentication

Published 2019-07-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.011 (63.6th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Discourse — versions 2.4.0
Discourse — versions < 2.3.0, 2.4.0.beta1, 2.4.0.beta2

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

github.com/discourse/discourse/commit/b8340c6c8e50a71ff1bca9654b9126ca5a84ce9a (Patch, Third Party Advisory)
github.com/discourse/discourse/commit/52387be4a44cdeaca5421ee955ba1343e836bade (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2019-1020018?: CVE-2019-1020018 is a high-severity vulnerability in Discourse, classified under Improper Authentication. CVSS score: 7.3/10. Published 2019-07-29.
How severe is CVE-2019-1020018?: High severity. CVSS v3 base score is 7.3 out of 10.