3.1
CWE
362
Advisory Published
CVE Published
Updated

CVE-2021-24000: Race Condition

First published: Mon Apr 19 2021(Updated: )

A race condition with requestPointerLock() and setTimeout() could have resulted in a user interacting with one tab when they believed they were on a separate tab. In conjunction with certain elements (such as &lt;input type="file"&gt;) this could have led to an attack where a user was confused about the origin of the webpage and potentially disclosed information they did not intend to. This vulnerability affects Firefox < 88.

Credit: security@mozilla.org security@mozilla.org

Affected SoftwareAffected VersionHow to fix
Mozilla Firefox<88
88
<88
88
Mozilla Firefox<88.0

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2021-24000?

    CVE-2021-24000 is a vulnerability that could have resulted in a user interacting with one tab when they believed they were on a separate tab in Mozilla Firefox.

  • How severe is CVE-2021-24000?

    CVE-2021-24000 has a severity value of 3.1, which is considered medium.

  • How can CVE-2021-24000 be exploited?

    CVE-2021-24000 could have been exploited through a race condition with requestPointerLock() and setTimeout() in conjunction with certain elements, such as <input type="file">.

  • Which software is affected by CVE-2021-24000?

    Mozilla Firefox versions up to exclusive 88.0 are affected by CVE-2021-24000.

  • How can I mitigate CVE-2021-24000?

    To mitigate CVE-2021-24000, users should update Mozilla Firefox to version 88.0 or later.

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