CVE-2023-22489

Published on: Not Yet Published

Last Modified on: 01/23/2023 05:55:00 PM UTC

CVE-2023-22489 - advisory for GHSA-hph3-hv3c-7725

Source: Mitre Source: NIST CVE.ORG Print: PDF PDF
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

Certain versions of Flarum from Flarum contain the following vulnerability:

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.

  • CVE-2023-22489 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as LOW severity.
  • Affected Vendor/Software: URL Logo flarum - framework version = >= 1.3.0, < 1.6.3

CVSS3 Score: 3.5 - LOW

Attack
Vector ⓘ		 Attack
Complexity		 Privileges
Required		 User
Interaction
NETWORK LOW LOW REQUIRED
Scope Confidentiality
Impact		 Integrity
Impact		 Availability
Impact
UNCHANGED NONE LOW NONE

CVE References

Description Tags ⓘ Link
Merge pull request from GHSA-hph3-hv3c-7725 · flarum/[email protected] · GitHub github.com
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 URL Logo MISC github.com/flarum/framework/commit/12f14112a0ecd1484d97330b82beb2a145919015
Release v1.6.3 · flarum/framework · GitHub github.com
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 URL Logo MISC github.com/flarum/framework/releases/tag/v1.6.3
Any user including unactivated can reply in public discussions whose first post was permanently deleted · Advisory · flarum/framework · GitHub github.com
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 URL Logo MISC github.com/flarum/framework/security/advisories/GHSA-hph3-hv3c-7725
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Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationFlarumFlarumAllAllAllAll
  • cpe:2.3:a:flarum:flarum:*:*:*:*:*:*:*:*:

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