MFSA2025-88: Security Vulnerabilities fixed in Firefox ESR 140.5
Published Nov 11, 2025
·Updated
Security Vulnerabilities fixed in Firefox ESR 140.5
Affected Software
1 affected componentFixes available
Mozilla Firefox ESR<140.5
140.5
Event History
Nov 11, 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 MFSA2025-88?
The severity of MFSA2025-88 is considered critical as it addresses multiple security vulnerabilities in Firefox ESR.
2
How do I fix MFSA2025-88?
To fix MFSA2025-88, update your Firefox ESR to version 140.5 or later.
3
What vulnerabilities are addressed in MFSA2025-88?
MFSA2025-88 addresses various security issues that could potentially lead to data breaches or unauthorized access.
4
What versions of Firefox ESR are affected by MFSA2025-88?
Firefox ESR versions prior to 140.5 are affected by the vulnerabilities outlined in MFSA2025-88.
5
Is it safe to use Firefox ESR if I haven't updated for MFSA2025-88?
Using an outdated version of Firefox ESR that is affected by MFSA2025-88 poses significant security risks and is not recommended.