Improper Authentication Affecting mutt package, versions <2.0.2-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
2.35% (83rd percentile)

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  • Snyk IDSNYK-ECHOLATEST-MUTT-20675217
  • published9 Oct 2026
  • disclosed23 Nov 2020

Introduced: 23 Nov 2020

CVE-2020-28896  (opens in a new tab)
CWE-287  (opens in a new tab)
CWE-755  (opens in a new tab)

How to fix?

Upgrade Echo:latest mutt to version 2.0.2-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mutt package and not the mutt package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

Mutt before 2.0.2 and NeoMutt before 2020-11-20 did not ensure that $ssl_force_tls was processed if an IMAP server's initial server response was invalid. The connection was not properly closed, and the code could continue attempting to authenticate. This could result in authentication credentials being exposed on an unencrypted connection, or to a machine-in-the-middle.

CVSS Base Scores

version 3.1