CVE-2023-48297 HIGH

CVE-2023-48297: Discourse vulnerable to unlimited mentioned users in message serializer

Vendor Discourse
Product discourse
Weakness CWE-400
Published January 12, 2024
Last update June 17, 2025
View on NVD All CVEs

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

What the vulnerability does

01Description

Discourse is a platform for community discussion. The message serializer uses the full list of expanded chat mentions (@all and @here) which can lead to a very long array of users. This issue was patched in versions 3.1.4 and beta 3.2.0.beta5.

Key dates

02Disclosure timeline

January 12, 2024 CVE published
June 17, 2025 Record updated