What is CVE-2018-19133?

CVE-2018-19133 is a medium-severity vulnerability in Flarum, classified under Information Disclosure. CVSS score: 5.3/10. Published 2018-11-09.

How severe is CVE-2018-19133?

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

Information disclosure in Flarum

CVE-2018-19133

In Flarum Core 0.1.0-beta.7.1, a serious leak can get everyone's email address.

Vulnerability class: Information Disclosure

Published 2018-11-09 · 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: 0.012 (66.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: +0.000

Affected products

Flarum — versions 0.1.0

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

github.com/flarum/core/issues/1628 (Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2018-19133?: CVE-2018-19133 is a medium-severity vulnerability in Flarum, classified under Information Disclosure. CVSS score: 5.3/10. Published 2018-11-09.
How severe is CVE-2018-19133?: Medium severity. CVSS v3 base score is 5.3 out of 10.