What’s Vulnerable › Vulnerabilities

CVE-2020-14093

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-15 · updated 2026-06-17
• Weakness: CWE-319

Description

Mutt before 1.14.3 allows an IMAP fcc/postpone man-in-the-middle attack via a PREAUTH response.

Affected products

• Canonical Ubuntu Linux: 12.04, 16.04, 18.04, 19.10, 20.04
• Debian Linux: 8.0, 9.0, 10.0
• mutt: before 1.14.3 — fixed in 1.14.3
• openSUSE Leap: 15.1, 15.2

How to fix

Upgrade to a fixed version: mutt 1.14.3. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00064.html
• http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00070.html
• http://www.mutt.org
• https://bugs.gentoo.org/728300
• https://github.com/muttmua/mutt/commit/3e88866dc60b5fa6aaba6fd7c1710c12c1c3cd01
• https://lists.debian.org/debian-lts-announce/2020/06/msg00039.html
• https://lists.debian.org/debian-lts-announce/2020/06/msg00040.html
• https://security.gentoo.org/glsa/202007-57
• https://usn.ubuntu.com/4401-1/
• https://www.debian.org/security/2020/dsa-4707
• https://www.debian.org/security/2020/dsa-4708
• http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00064.html

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