CVE-2022-4055

xdg-utils: improper parse of mailto URIs allows bypass of Thunderbird security mechanism for attachments

Published Nov 18, 2022 CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed
Description
When xdg-mail is configured to use thunderbird for mailto URLs, improper parsing of the URL can lead to additional headers being passed to thunderbird that should not be included per RFC 2368. An attacker can use this method to create a mailto URL that looks safe to users, but will actually attach files when clicked.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
EUVD EUVD EUVD-2022-51432 When xdg-mail is configured to use thunderbird for mailto URLs, improper parsing of the URL can lead to additional headers being passed to thunderbird that should not be included per RFC 2368. An attacker can use this method to create a mailto URL that looks safe to users, but will actually attach files when clicked.
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00028}

epss

{'score': 0.00025}

Type Values Removed Values Added
First Time appeared Redhat
Redhat enterprise Linux
CPEs cpe:/a:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Apr 29, 2025, 6:55 PM
Reserved
Nov 17, 2022, 12:00 AM
Status
Modified
Published
Nov 19, 2022, 12:15 AM
Modified
Jun 17, 2026, 5:19 AM
Severity
Moderate
Public date
Aug 3, 2022, 12:00 AM