Same-Origin Policy Bypass in Firefox Browser by Mozilla

CVE-2025-14331

What is CVE-2025-14331?

A vulnerability has been identified in the Request Handling component of the Firefox browser, allowing a circumvention of the same-origin policy. This flaw affects specific versions of Firefox and its Extended Support Release (ESR) variants, potentially exposing users to security risks by allowing malicious websites to access sensitive data from other domains. Affected versions include Firefox prior to 146, and both Firefox ESR versions below 115.31 and 140.6. Users are strongly advised to upgrade to the latest versions to mitigate potential exploit risks.

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