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.
総合評価: CVE-2021-24000 は低リスク（28.2/100）。CVSS 深刻度は低。悪用される可能性が高い（EPSS 0.60%、44 パーセンタイル） 推奨対応: 悪用情報と EPSS の推移を監視し、必要に応じて優先度を見直してください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.23% | 0.60% | +0.37% |
| 2 | 2025-03-30 | 0.48% | 0.23% | -0.25% |
| 3 | 2025-03-29 | — | 0.48% | — |
EPSS の全履歴 （全 9 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 3.1 | 3.1 | LOW |
|
1.6 | 1.4 | [email protected] |
| 2.6 | 2.0 | LOW |
|
4.9 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
low | CVE-2021-24000: 2 source package rows (firefox, librewolf); 48 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 10, open 38. | https://security.alpinelinux.org/vuln/CVE-2021-24000 |
debian
|
not yet assigned | CVE-2021-24000 not yet assigned priority: Debian including 1 source packages (firefox), 1 status rows across 1 suites (sid): resolved 1. | https://security-tracker.debian.org/tracker/CVE-2021-24000 |
suse
|
high | CVE-2021-24000 severity important: SUSE including 9 source package names (MozillaFirefox-92.0-1.2, MozillaFirefox-branding-upstream-92.0-1.2, …), 9 product×package rows across 1 product lines (openSUSE Tumbleweed): Fixed 9. | https://www.suse.com/security/cve/CVE-2021-24000/ |
ubuntu
|
medium | CVE-2021-24000 medium priority: Ubuntu including 5 source packages (firefox, mozjs38, mozjs52, mozjs68, mozjs78), 65 status rows across 13 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, trusty, upstream, xenial): DNE 37, ignored 16, released 12. | https://ubuntu.com/security/CVE-2021-24000 |
| URL | タグ |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1694698 | Issue Tracking Permissions Required Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2021-16/ | Release Notes Vendor Advisory |