BigBlueButton is an open source web conferencing system. Versions prior to 2.4-rc-6 are subject to Ineffective user bans. The attacker could register multiple users, and join the meeting with one of them. When that user is banned, they could still join the meeting with the remaining registered users from the same extId. This issue has been fixed by improving permissions such that banning a user removes all users related to their extId, including registered users that have not joined the meeting. This issue is patched in versions 2.4-rc-6 and 2.5-alpha-1. There are no workarounds.
総合評価: CVE-2022-41961 は低リスク(24.2/100)。CVSS 深刻度は中。悪用される可能性が高い(EPSS 0.28%、20 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 | 0.12% | 0.28% | +0.16% |
| 2 | 2026-01-05 | 0.20% | 0.12% | -0.08% |
| 3 | 2025-12-17 | — | 0.20% | — |
EPSS の全履歴 (全 5 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 |
|---|---|---|---|---|---|---|
| 4.3 | 3.1 | MEDIUM |
|
2.8 | 1.4 | [email protected] |
| 4.3 | 3.1 | MEDIUM |
|
2.8 | 1.4 | [email protected] |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| bigbluebutton | bigbluebutton | < 2.4 | cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.4 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.4:alpha1:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.4 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.4:alpha2:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.4 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.4:beta1:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.4 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.4:beta2:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.4 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.4:beta3:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.4 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.4:beta4:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.4 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.4:rc1:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.4 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.4:rc3:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.4 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.4:rc4:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.4 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.4:rc5:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4-rc-6 | Release Notes Third Party Advisory |
| https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.5-alpha-1 | Release Notes Third Party Advisory |
| https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-wxjp-h88g-7fqg | Patch Release Notes Third Party Advisory |