CVE-2020-37248

medium

Description

OfflineIMAP before 8.0.3 trusts the server with their STARTTLS capability prior to authentication, which allows STRIPTLS/man-in-the-middle attacks, taking over the connection and extracting account credentials in cleartext.

References

https://pypi.org/project/offlineimap/#history

https://github.com/OfflineIMAP/offlineimap3/issues/222

https://github.com/OfflineIMAP/offlineimap3/commit/46505c53ef995455d66c685f9ec3ff6ea93dbb74

https://github.com/OfflineIMAP/offlineimap/issues/669

http://www.openwall.com/lists/oss-security/2026/06/08/3

Details

Source: Mitre, NVD

Published: 2026-06-08

Updated: 2026-06-08

Risk Information

CVSS v2

Base Score: 6.1

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N