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xdg-utils — security advisory

Type: advisorySources: OSVAdvisory ID: DEBIAN-CVE-2020-27748

A flaw was found in the xdg-email component of xdg-utils-1.1.0-rc1 and newer. When handling mailto: URIs, xdg-email allows attachments to be discreetly added via the URI when being passed to Thunderbird. An attacker could potentially send a victim a URI that automatically attaches a sensitive file to a new email. If a victim user does not notice that an attachment was added and sends the email, this could result in sensitive information disclosure. It has been confirmed that the code behind this issue is in xdg-email and not in Thunderbird.

Products
xdg-utils
Affected versions
1.1.3-4.1, 1.2.1-1, 1.2.1-2
Fixed versions
Not specified
CVEs
CVE-2020-27748
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 13:46 UTC · Revision 1

Source evidence

DEBIAN-CVE-2020-27748

core-osv · Original source

Published 1 Jun 2021, 14:15 UTC

A flaw was found in the xdg-email component of xdg-utils-1.1.0-rc1 and newer. When handling mailto: URIs, xdg-email allows attachments to be discreetly added via the URI when being passed to Thunderbird. An attacker could potentially send a victim a URI that automatically attaches a sensitive file to a new email. If a victim user does not notice that an attachment was added and sends the email, this could result in sensitive information disclosure. It has been confirmed that the code behind this issue is in xdg-email and not in Thunderbird.

osv:DEBIAN-CVE-2020-27748

xdg-utils

Fixed versions: Not specified

xdg-utils

Fixed versions: Not specified

xdg-utils

Fixed versions: Not specified

Complete source record
{
  "id": "509dc59844f89610c17dbef11cb32ac19c9c316468445cc5ea7379b2ab959bce",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2020-27748",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2020-27748",
    "summary": "A flaw was found in the xdg-email component of xdg-utils-1.1.0-rc1 and newer. When handling mailto: URIs, xdg-email allows attachments to be discreetly added via the URI when being passed to Thunderbird. An attacker could potentially send a victim a URI that automatically attaches a sensitive file to a new email. If a victim user does not notice that an attachment was added and sends the email, this could result in sensitive information disclosure. It has been confirmed that the code behind this issue is in xdg-email and not in Thunderbird.",
    "evidence": "osv:DEBIAN-CVE-2020-27748",
    "products": [
      {
        "name": {
          "value": "xdg-utils",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.1.3-4.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2.1-2",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "xdg-utils",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.2.1-2",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "xdg-utils",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.2.1-2",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "DEBIAN-CVE-2020-27748",
      "aliases": [
        "DEBIAN-CVE-2020-27748"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "xdg-utils",
            "purl": "pkg:deb/debian/xdg-utils?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "versions": [
            "1.1.3-4.1",
            "1.2.1-1",
            "1.2.1-2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-27748.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "xdg-utils",
            "purl": "pkg:deb/debian/xdg-utils?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "1.2.1-2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-27748.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "xdg-utils",
            "purl": "pkg:deb/debian/xdg-utils?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "1.2.1-2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-27748.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-26T12:02:41.963538696Z",
      "provider": "osv",
      "upstream": [
        "CVE-2020-27748"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2020-27748"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2020-27748",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 452811,
  "published_at": "2021-06-01T14:15:08.387+00:00"
}