CVE-2025-10531: Mitigation bypass in the Web Compatibility: Tooling component
Published Sep 16, 2025
·Updated
Mitigation bypass in the Web Compatibility: Tooling component. This vulnerability was fixed in Firefox 143 and Thunderbird 143.
Affected Software
5 affected componentsFixes available
Mozilla Firefox<143
Mozilla Firefox<143
143
Mozilla Thunderbird<143
143
Mozilla Firefox<143.0
Mozilla Thunderbird<143.0
Event History
Sep 16, 2025
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
Updated
via Mozilla·12:00 AM
Affected Software
CVE Published
via MITRE·12:26 PM
Data Sourced
via MITRE·12:26 PM
Description
Data Sourced
via NVD·01:15 PM
DescriptionSeverityWeaknessAffected Software
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
1
What is the severity of CVE-2025-10531?
CVE-2025-10531 is classified as a high-severity vulnerability affecting Mozilla Firefox versions earlier than 143.
2
How do I fix CVE-2025-10531?
To fix CVE-2025-10531, update your Mozilla Firefox browser to version 143 or later.
3
What types of issues does CVE-2025-10531 cause?
CVE-2025-10531 may lead to security vulnerabilities that can be exploited by attackers to compromise the browser.
4
Who is affected by CVE-2025-10531?
Users of Mozilla Firefox versions prior to 143 are affected by CVE-2025-10531.
5
Is CVE-2025-10531 patched in the latest Firefox versions?
Yes, CVE-2025-10531 has been addressed and patched in Mozilla Firefox version 143 and above.