PT-2026-47305 · Offlineimap · Offlineimap

Published 2026-06-08 · Updated 2026-06-08 · CVE-2020-37248

NVD

CVSS v3.1

6.5

Medium

Base vector

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

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.

Fix

Weakness Enumeration

CWE-348

Related Identifiers

CVE-2020-37248

Affected Products

Offlineimap

References · 6

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