CVE-2021-24000

low-risk

Published 2021-06-24

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.

Do I need to act?

0.23% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 3.1/10 Low

NETWORK / HIGH complexity

Affected Products (1)

Firefox

Affected Vendors

Mozilla

References (4)

Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1694698

Release Notes https://www.mozilla.org/security/advisories/mfsa2021-16/

Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1694698

Release Notes https://www.mozilla.org/security/advisories/mfsa2021-16/

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low-risk

Severity 11/34 · Low

Exploitability 1/34 · Minimal

Exposure 5/34 · Minimal