Resource exhaustion in Discourse - CVE-2024-21655
Published: January 9, 2024 / Updated: July 1, 2026
Vulnerability identifier: #VU136093
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2024-21655
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Civilized Discourse Construction Kit, Inc.
Affected software:
Discourse
Discourse
Detailed vulnerability description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in client-editable custom field values when processing oversized field data. A remote user can submit excessively large custom field values to cause a denial of service.
The issue can lead to excessive disk space consumption and often excessive bandwidth usage.
How to mitigate CVE-2024-21655
Install security update from vendor's website.