MediumFix available
offlineimap3 — security advisory
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.
- Products
- offlineimap3
- Affected versions
- 0.0~git20211018.e64c254+dfsg-2, 0.0~git20230519.c9f44ad+dfsg-1, 0.0~git20231201.77e70ed+dfsg-1, 0.0~git20231218.d29a4dc+dfsg-1, 0.0~git20231218.d29a4dc+dfsg-2, 0.0~git20231218.d29a4dc+dfsg-3, 0.0~git20231218.d29a4dc+dfsg-4, 0.0~git20240826.db34745+dfsg-1, 0.0~git20240826.db34745+dfsg-2, 8.0.2+dfsg-1, 8.0.2+dfsg-2~exp1, 8.0.3+dfsg-1, 8.0.3+dfsg-2
- Fixed versions
- 8.0.3+dfsg-1
- CVEs
- CVE-2020-37248
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 14:04 UTC · Revision 1
Source evidence
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.
osv:DEBIAN-CVE-2020-37248
offlineimap3
Fixed versions: Not specified
offlineimap3
Fixed versions: Not specified
offlineimap3
Fixed versions: 8.0.3+dfsg-1
Complete source record
{
"id": "69008edba31721c004dcef3095de35cb826bea85a49ad252efb21402fad8d8dd",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2020-37248",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2020-37248",
"summary": "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.",
"evidence": "osv:DEBIAN-CVE-2020-37248",
"products": [
{
"name": {
"value": "offlineimap3",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.0~git20211018.e64c254+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20230519.c9f44ad+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20231201.77e70ed+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20231218.d29a4dc+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20231218.d29a4dc+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20231218.d29a4dc+dfsg-3",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20231218.d29a4dc+dfsg-4",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20240826.db34745+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20240826.db34745+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "8.0.2+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.0.2+dfsg-2~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "8.0.3+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.0.3+dfsg-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "offlineimap3",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.0~git20240826.db34745+dfsg-2",
"evidence": "/affected/1/versions"
},
{
"value": "8.0.2+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "8.0.2+dfsg-2~exp1",
"evidence": "/affected/1/versions"
},
{
"value": "8.0.3+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "8.0.3+dfsg-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "offlineimap3",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8.0.3+dfsg-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "0.0~git20240826.db34745+dfsg-2",
"evidence": "/affected/2/versions"
},
{
"value": "8.0.2+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "8.0.2+dfsg-2~exp1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2020-37248",
"aliases": [
"DEBIAN-CVE-2020-37248"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "offlineimap3",
"purl": "pkg:deb/debian/offlineimap3?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.0~git20211018.e64c254+dfsg-2",
"0.0~git20230519.c9f44ad+dfsg-1",
"0.0~git20231201.77e70ed+dfsg-1",
"0.0~git20231218.d29a4dc+dfsg-1",
"0.0~git20231218.d29a4dc+dfsg-2",
"0.0~git20231218.d29a4dc+dfsg-3",
"0.0~git20231218.d29a4dc+dfsg-4",
"0.0~git20240826.db34745+dfsg-1",
"0.0~git20240826.db34745+dfsg-2",
"8.0.2+dfsg-1",
"8.0.2+dfsg-2~exp1",
"8.0.3+dfsg-1",
"8.0.3+dfsg-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-37248.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "offlineimap3",
"purl": "pkg:deb/debian/offlineimap3?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.0~git20240826.db34745+dfsg-2",
"8.0.2+dfsg-1",
"8.0.2+dfsg-2~exp1",
"8.0.3+dfsg-1",
"8.0.3+dfsg-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-37248.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.0.3+dfsg-1"
}
]
}
],
"package": {
"name": "offlineimap3",
"purl": "pkg:deb/debian/offlineimap3?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.0~git20240826.db34745+dfsg-2",
"8.0.2+dfsg-1",
"8.0.2+dfsg-2~exp1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-37248.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T12:02:49.875585947Z",
"provider": "osv",
"upstream": [
"CVE-2020-37248"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2020-37248"
]
},
"related_cves": [
{
"value": "CVE-2020-37248",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 453105,
"published_at": "2026-06-08T16:16:33.257+00:00"
}