{"id":"CVE-2021-29961","details":"When styling and rendering an oversized `\u003cselect\u003e` element, Firefox did not apply correct clipping which allowed an attacker to paint over the user interface. This vulnerability affects Firefox \u003c 89.","modified":"2026-05-04T08:37:43.273962Z","published":"2021-06-24T14:15:10.233Z","withdrawn":"2026-05-04T08:37:43.273962Z","related":["openSUSE-SU-2024:10600-1","openSUSE-SU-2024:14572-1"],"references":[{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-23/"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202107-09"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1700235"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29961.json","unresolved_ranges":[{"events":[{"introduced":"78.11.0"},{"fixed":"89.0"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N"}]}