Informazioni sul CVE-2023-22489
Flarum is missing authorization in discussion replies
CWE ID: CWE-862
Base Score (CVSS): N/A
CVE: CVE-2023-22489
Descrizione: 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.
Vettore di attacco CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Punteggio CVSS
Il CVSS è un sistema di valutazione che misura la gravità di una vulnerabilità informatica considerando fattori come l’impatto potenziale, la probabilità di attacco e la facilità di esecuzione.
Riassunto: Accesso: Network, Privilegi: Low, Interazione utente: Required, Confidenzialità: None, Integrità: Low, Disponibilità: None.
Dettaglio del Vettore
| Metrica | Valore | Significato | Descrizione |
|---|---|---|---|
| Attack Vector (AV) | N | Network | L’attacco può essere eseguito da remoto attraverso la rete. |
| Attack Complexity (AC) | L | Low | L’attacco non richiede condizioni particolari. |
| Privileges Required (PR) | L | Low | Richiede pochi privilegi. |
| User Interaction (UI) | R | Required | È richiesta l’interazione di un utente. |
| Scope (S) | U | Unchanged | Il raggio d’azione non cambia. |
| Confidentiality Impact (C) | N | None | Nessun impatto sulla riservatezza. |
| Integrity Impact (I) | L | Low | Impatto limitato. |
| Availability Impact (A) | N | None | Nessun impatto sulla disponibilità. |
Riferimenti esterni
- https://github.com/flarum/framework/security/advisories/GHSA-hph3-hv3c-7725
- https://github.com/flarum/framework/commit/12f14112a0ecd1484d97330b82beb2a145919015
- https://github.com/flarum/framework/releases/tag/v1.6.3
Prodotti interessati
- flarum – framework
Relazioni con altri prodotti
Produttore:flarum
Prodotto: framework
Anno: 2023
CWE: CWE-862
CVSS: 0.0