MFSA2025-91: Security Vulnerabilities fixed in Thunderbird 140.5
Published Nov 12, 2025
·Updated
Security Vulnerabilities fixed in Thunderbird 140.5
Affected Software
1 affected componentFixes available
Mozilla Thunderbird<140.5
140.5
Event History
Nov 12, 2025
Advisory Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
Child vulnerabilities
Contains the following vulnerabilities.
Frequently Asked Questions
1
What is the severity of MFSA2025-91?
The severity of MFSA2025-91 is considered high due to the potential exploitation of multiple security vulnerabilities.
2
How do I fix MFSA2025-91?
To fix MFSA2025-91, update to Thunderbird version 140.5 or later.
3
What types of vulnerabilities are addressed by MFSA2025-91?
MFSA2025-91 addresses security vulnerabilities that could allow for code execution and information disclosure.
4
Is MFSA2025-91 applicable to earlier versions of Thunderbird?
Yes, MFSA2025-91 is applicable to all versions of Thunderbird prior to 140.5.
5
Are there any known exploits for MFSA2025-91?
As of now, there are no widely reported exploits specifically targeting MFSA2025-91.