CVE-2023-3417

File Extension Spoofing using the Text Direction Override Character

Published Jul 24, 2023 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
Thunderbird allowed the Text Direction Override Unicode Character in filenames. An email attachment could be incorrectly shown as being a document file, while in fact it was an executable file. Newer versions of Thunderbird will strip the character and show the correct file extension. This vulnerability affects Thunderbird < 115.0.1 and Thunderbird < 102.13.1.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-3510-1 thunderbird security update
Debian DSA Debian DSA DSA-5463-1 thunderbird security update
EUVD EUVD EUVD-2023-44083 Thunderbird allowed the Text Direction Override Unicode Character in filenames. An email attachment could be incorrectly shown as being a document file, while in fact it was an executable file. Newer versions of Thunderbird will strip the character and show the correct file extension. This vulnerability affects Thunderbird < 115.0.1 and Thunderbird < 102.13.1.
Ubuntu USN Ubuntu USN USN-6333-1 Thunderbird vulnerabilities
History
Type Values Removed Values Added
Title thunderbird: File Extension Spoofing using the Text Direction Override Character File Extension Spoofing using the Text Direction Override Character
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Dec 18, 2025, 3:22 PM
Reserved
Jun 26, 2023, 5:25 PM
Status
Modified
Published
Jul 24, 2023, 11:15 AM
Modified
Jun 17, 2026, 6:14 AM
Severity
Moderate
Public date
Jul 20, 2023, 12:00 AM