GHSA-hph3-hv3c-7725 · 深刻度： low · エコシステム： composer — Any Flarum user including unactivated can reply in public discussions whose first post was permanently deleted
Flarum is a discussion platform for websites. If the first post of a discussion is permanently deleted but the discussion stays visible, any actor who can view the discussion is able to create a new reply via the REST API, no matter the reply permission or lock status. This includes users that don't have a validated email. Guests cannot successfully create a reply because the API will fail with a 500 error when the user ID 0 is inserted into the database. This happens because when the first post of a discussion is permanently deleted, the `first_post_id` attribute of the discussion becomes `null` which causes access control to be skipped for all new replies. Flarum automatically makes discussions with zero comments invisible so an additional condition for this vulnerability is that the discussion must have at least one approved reply so that `discussions.comment_count` is still above zero after the post deletion. This can open the discussion to uncontrolled spam or just unintentional replies if users still had their tab open before the vulnerable discussion was locked and then post a reply when they shouldn't be able to. In combination with the email notification settings, this could also be used as a way to send unsolicited emails. Versions between `v1.3.0` and `v1.6.3` are impacted. The vulnerability has been fixed and published as flarum/core v1.6.3. All communities running Flarum should upgrade as soon as possible. There are no known workarounds.
総合評価: CVE-2023-22489 は低リスク（28.8/100）。CVSS 深刻度は低。悪用される可能性が高い（EPSS 0.56%、42 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 | 0.30% | 0.56% | +0.26% |
| 2 | 2026-01-15 | 0.43% | 0.30% | -0.14% |
| 3 | 2026-01-14 | — | 0.43% | — |
EPSS の全履歴 （全 7 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 |
|---|---|---|---|---|---|---|
| 3.5 | 3.1 | LOW |
|
2.1 | 1.4 | [email protected] |
| 3.5 | 3.1 | LOW |
|
2.1 | 1.4 | [email protected] |
GHSA-hph3-hv3c-7725 · 深刻度： low · エコシステム： composer — Any Flarum user including unactivated can reply in public discussions whose first post was permanently deleted
| URL | タグ |
|---|---|
| https://github.com/flarum/framework/commit/12f14112a0ecd1484d97330b82beb2a145919015 | Patch Third Party Advisory |
| https://github.com/flarum/framework/releases/tag/v1.6.3 | Release Notes Third Party Advisory |
| https://github.com/flarum/framework/security/advisories/GHSA-hph3-hv3c-7725 | Mitigation Third Party Advisory |