What is CVE-2018-20954?

CVE-2018-20954 is a high-severity vulnerability in Mailpile, classified under Improper Authentication. CVSS score: 7.5/10. Published 2019-08-08.

How severe is CVE-2018-20954?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Mailpile

CVE-2018-20954

The "Security and Privacy" Encryption feature in Mailpile before 1.0.0rc4 does not exclude disabled, revoked, and expired keys.

Vulnerability class: Broken Authentication

Published 2019-08-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.011 (65.6th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.6% 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

Mailpile — versions 0.5.0, 0.5.1, 0.5.2

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

github.com/mailpile/Mailpile/pull/2145 (Third Party Advisory)
github.com/mailpile/Mailpile/commit/49b64f62ade9ade3dff9337c7bbc1171eab3d59e (Patch, Third Party Advisory)
github.com/mailpile/Mailpile/compare/1.0.0rc3...1.0.0rc4 (Third Party Advisory)

Frequently asked questions

What is CVE-2018-20954?: CVE-2018-20954 is a high-severity vulnerability in Mailpile, classified under Improper Authentication. CVSS score: 7.5/10. Published 2019-08-08.
How severe is CVE-2018-20954?: High severity. CVSS v3 base score is 7.5 out of 10.