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CVE-2020-37248

CVE-2020-37248

CVSS 6.5 MEDIUMEPSS 0.2%CWE-348
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Affected products
OfflineIMAP · OfflineIMAP

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References
https://github.com/OfflineIMAP/offlineimap3/commit/46505c53ef995455d66c685f9ec3ff6ea93dbb74https://github.com/OfflineIMAP/offlineimap3/issues/222https://github.com/OfflineIMAP/offlineimap/issues/669https://pypi.org/project/offlineimap/#historyhttp://www.openwall.com/lists/oss-security/2026/06/08/3