CVE-2020-28896

MEDIUM
5.3
CVSS Score
Published: November 23, 2020 at 06:52 PM UTC
Updated: June 17, 2026 at 03:10 AM UTC
3 products affected across 3 vendorsDebian LinuxMuttNeomutt

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Severity
MEDIUM5.3
Exploit prediction
EPSS 2%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.0.2
Affected range stops below 2.0.2, so it looks safe — our inference, not a vendor statement
v < 2020-11-20
Affected range stops below 2020-11-20, so it looks safe — our inference, not a vendor statement

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287CWE-755

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