CVE-2020-37248

offlineimap3: OfflineIMAP before 8.0.3 trusts the server with their STARTTLS capability prior to authentication, which allows STRIP...

CVE-2020-37248 is fixed in offlineimap3 on 1 platform by DEBIAN-CVE-2020-37248 (version 8.0.3+dfsg-1), released June 8, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
6.5
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0019
8th percentile

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.

Where it's fixed

ProductFixed inFixReleased
Linux
offlineimap3 · Debian 14 8.0.3+dfsg-1 DEBIAN-CVE-2020-37248 Jun 8, 2026

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