UI Overlay Vulnerability in Firefox < 89 when Styling and Rendering Oversized `<select>` Element

CVE-2021-29961 · MEDIUM Severity

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

When styling and rendering an oversized `<select>` element, Firefox did not apply correct clipping which allowed an attacker to paint over the user interface. This vulnerability affects Firefox < 89.

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