What is CVE-2020-19037?

CVE-2020-19037 is a medium-severity vulnerability in Halo, classified under Improper Authentication. CVSS score: 5.3/10. Published 2021-07-12.

How severe is CVE-2020-19037?

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

Auth bypass in Halo

CVE-2020-19037

Incorrect Access Control vulnearbility in Halo 0.4.3, which allows a malicious user to bypass encrption to view encrpted articles via cookies.

Vulnerability class: Broken Authentication

Published 2021-07-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Halo — versions 0.4.3

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

github.com/halo-dev/halo/issues/135 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2020-19037?: CVE-2020-19037 is a medium-severity vulnerability in Halo, classified under Improper Authentication. CVSS score: 5.3/10. Published 2021-07-12.
How severe is CVE-2020-19037?: Medium severity. CVSS v3 base score is 5.3 out of 10.