CVE-2021-29987

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    CVE-2021-29987

    Published: 17 Aug 2021Last Modified: 10 Mar 2026

    Summary:

    Details: After requesting multiple permissions, and closing the first permission panel, subsequent permission panels will be displayed in a different position but still record a click in the default location, making it possible to trick a user into accepting a permission they did not want to. *This bug only affects Firefox on Linux. Other operating systems are unaffected.*. This vulnerability affects Firefox < 91 and Thunderbird < 91.

    References: , https://security.gentoo.org/glsa/202202-03, https://www.mozilla.org/security/advisories/mfsa2021-33/, https://www.mozilla.org/security/advisories/mfsa2021-36/, https://bugzilla.mozilla.org/show_bug.cgi?id=1716129

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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
    CVE-2021-29987 | CVE-DB