CVE-2023-3417 - CVE House
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Status published Unknown CVE-2023-3417

File Extension Spoofing using the Text Direction Override Character

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • 이준성 (Junsung Lee)

References

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Affected Vendor

Affected Software

Thunderbird
Vulnerable Versions:
unspecified

Timeline

Official Publish: July 24th, 2023
Last Modified: December 18th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.