CVE-2025-10531: Mitigation bypass in the Web Compatibility: Tooling component
Mitigation bypass in the Web Compatibility: Tooling component. This vulnerability was fixed in Firefox 143 and Thunderbird 143.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 143 - Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 143 - Upgrade
Upgrade
Thunderbirdto a version that resolves this vulnerability.Fixed in 143
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
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.
How do I fix CVE-2025-10531?
To fix CVE-2025-10531, update your Mozilla Firefox browser to version 143 or later.
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.
Who is affected by CVE-2025-10531?
Users of Mozilla Firefox versions prior to 143 are affected by CVE-2025-10531.
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.