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.

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Solution

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Workaround

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History

Mon, 08 Jun 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 08 Jun 2026 16:45:00 +0000

Type Values Removed Values Added
Title Startup TLS Trust Issue Enables Credential Disclosure

Mon, 08 Jun 2026 15:45:00 +0000

Type Values Removed Values Added
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.
First Time appeared Offlineimap
Offlineimap offlineimap
Weaknesses CWE-348
CPEs cpe:2.3:a:offlineimap:offlineimap:*:*:*:*:*:*:*:*
Vendors & Products Offlineimap
Offlineimap offlineimap
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-06-08T18:49:00.993Z

Reserved: 2026-06-08T15:05:08.771Z

Link: CVE-2020-37248

cve-icon Vulnrichment

Updated: 2026-06-08T18:08:35.611Z

cve-icon NVD

Status : Received

Published: 2026-06-08T16:16:33.257

Modified: 2026-06-08T16:16:33.257

Link: CVE-2020-37248

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-08T16:30:06Z

Weaknesses