CVE-2021-24000

3.1 lowEPSS 0.6%

Low (3.1) in mozilla firefox. EPSS 0.6% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

3.1 low

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

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 48% of CVEs (scores of 2026-11-01)
CWE: CWE-362
Published: 2021-06-24
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mozilla:firefox

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1694698
https://www.mozilla.org/security/advisories/mfsa2021-16/
https://bugzilla.mozilla.org/show_bug.cgi?id=1694698
https://www.mozilla.org/security/advisories/mfsa2021-16/

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