VULNERABILITY INTELLIGENCE

CVE-2021-24000

CVSS score3.1 LOW

EPSS probability0.60%

CISA KEVNot currently listed

Published2021-06-24

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

Description

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 <input type="file">) 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.

Weakness classification

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Primary references

security@mozilla.org — Issue Tracking, Permissions Required, Vendor Advisory
security@mozilla.org — Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking, Permissions Required, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory