CVE-2020-37248

State: Published
Severity: 6.5 Medium
Published: Jun 8, 2026
Updated: Jun 8, 2026
Reserved: Jun 8, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N	mitre

Weaknesses

CWE-348 Use of Less Trusted Source

Affected Products

Product	Versions
OfflineIMAPOfflineIMAP	before 8.0.3Affected

References

https://github.com/OfflineIMAP/offlineimap3/commit/46505c53ef995455d66c685f9ec3ff6ea93dbb74
https://github.com/OfflineIMAP/offlineimap3/issues/222
https://github.com/OfflineIMAP/offlineimap/issues/669
https://pypi.org/project/offlineimap/#history
http://www.openwall.com/lists/oss-security/2026/06/08/3

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