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CVE-2025-6426

Good to know:

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Date: June 24, 2025

The executable file warning did not warn users before opening files with the "terminal" extension. This bug only affects Firefox for macOS. Other versions of Firefox are unaffected. This vulnerability affects Firefox < 140, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12.

Severity Score

Related Resources (7)

https://www.mozilla.org/security/advisories/mfsa2025-55/
https://www.mozilla.org/security/advisories/mfsa2025-54/
https://bugzilla.mozilla.org/show_bug.cgi?id=1964385
https://www.mozilla.org/security/advisories/mfsa2025-51/
https://nvd.nist.gov/vuln/detail/CVE-2025-6426
https://www.mozilla.org/security/advisories/mfsa2025-53/
https://www.mend.io/vulnerability-database/CVE-2025-6426

Severity Score

Weakness Type (CWE)

Insufficient Verification of Data Authenticity

CWE-345

Top Fix

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Upgrade Version

Upgrade to version https://github.com/mozilla/gecko-dev.git - null

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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