offlineimap before 6.3.2 does not check for SSL server certificate validation when "ssl = yes" option is specified which can allow man-in-the-middle attacks.
https://www.openwall.com/lists/oss-security/2010/12/23/2
https://security-tracker.debian.org/tracker/CVE-2010-4532
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2010-4532
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=603450
https://access.redhat.com/security/cve/cve-2010-4532
Source: Mitre, NVD
Published: 2019-11-13
Updated: 2020-08-18
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 5.9
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS: 0.00231