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    CVE-2025-6431

    When a link can be opened in an external application, Firefox for Android will, by default, prompt the user before doing so. An attacker could have bypassed this prompt, potentially exposing the user to security vulnerabilities or privacy leaks in external applications. *This bug only affects Firefox for Android. Other versions of Firefox are unaffected.*. This vulnerability was fixed in Firefox 140.

    Published:Jun 24, 2025
    Last Modified:Apr 20, 2026
    EPS:Jun 24, 2025
    EPSS Score:0.00181
    CVSS Score:6.5

    Affected Products

    Vendor
    Google
    Product
    Android
    Vendor
    Mozilla
    Product
    Firefox

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-285 Improper Authorization

    Related CVEs

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    CVE-2026-87597 (CVSS 4.8) — UI misrepresentation in CustomTabs in Google Chrome on on Android prior to 153.0.8010.36 allowed a remote atta…
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    CVE-2026-87463 (CVSS 4.8) — Incorrect authorization in Certificate in Google Chrome on on Android prior to 153.0.8010.36 allowed a remote …
    CVE-2026-87483 (CVSS 6.5) — Incorrect authorization in Browser in Google Chrome on on Android prior to 153.0.8010.36 allowed a remote atta…
    CVE-2026-87600 (CVSS 6.5) — Improper input validation in Safebrowsing in Google Chrome on on Android prior to 153.0.8010.36 allowed a remo…
    CVE-2026-87555 (CVSS 4.7) — Uninitialized resource in GPU in Google Chrome on on Android prior to 153.0.8010.36 allowed a remote attacker …
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High