Vulnerability-Lookup

GHSA-899R-9FXV-Q4XM

Vulnerability from github – Published: 2026-06-08 18:31 – Updated: 2026-06-08 21:31

Details

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.

Severity

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2020-37248"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-348"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-08T16:16:33Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-899r-9fxv-q4xm",
  "modified": "2026-06-08T21:31:49Z",
  "published": "2026-06-08T18:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-37248"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OfflineIMAP/offlineimap/issues/669"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OfflineIMAP/offlineimap3/issues/222"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OfflineIMAP/offlineimap3/commit/46505c53ef995455d66c685f9ec3ff6ea93dbb74"
    },
    {
      "type": "WEB",
      "url": "https://pypi.org/project/offlineimap/#history"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/06/08/3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2020-37248 (GCVE-0-2020-37248)

Vulnerability from cvelistv5 – Published: 2026-06-08 15:05 – Updated: 2026-06-08 18:49

Summary

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-348 - Use of Less Trusted Source

Assigner

mitre

References

5 references

URL	Tags
https://github.com/OfflineIMAP/offlineimap3/commi…
https://github.com/OfflineIMAP/offlineimap3/issues/222
https://github.com/OfflineIMAP/offlineimap/issues/669
https://pypi.org/project/offlineimap/#history
http://www.openwall.com/lists/oss-security/2026/06/08/3

Impacted products

1 product

Vendor	Product	Version
OfflineIMAP	OfflineIMAP	Affected: 0 , < 8.0.3 (semver)

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JSON

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                  },
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                "timestamp": "2026-06-08T18:08:25.432667Z",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-899R-9FXV-Q4XM

CVE-2020-37248 (GCVE-0-2020-37248)

Tags

Sightings

Nomenclature