# 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.

- Web page: https://patchblox.com/security/cve/CVE-2020-37248
- Priority: Routine
- CVSS: 6.5 (medium)
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 8, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | offlineimap3 Debian 14 | 8.0.3+dfsg-1 | [DEBIAN-CVE-2020-37248](https://patchblox.com/security/data/fix/linux/debian-cve-2020-37248.md) | Jun 8, 2026 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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