CVE-2020-37248

6.5 MEDIUM

OfflineIMAP before 8.0.3 trusts the server with their STARTTLS capability prior to authentication, which allows STRIPTLS/man-in-the-middl...

Published: 2026-06-08 · Last updated: 2026-06-09

Severity and scoring

CVSS: 6.5 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
CWE: CWE-348

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2020-37248
[Other]https://github.com/OfflineIMAP/offlineimap/issues/669
[Other]https://github.com/OfflineIMAP/offlineimap3/commit/46505c53ef995455d66c685f9ec3ff6ea93dbb74
[Other]https://github.com/OfflineIMAP/offlineimap3/issues/222
[Other]https://pypi.org/project/offlineimap/#history
[Other]http://www.openwall.com/lists/oss-security/2026/06/08/3

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