Allocation of Resources Without Limits or Throttling in Discourse - CVE-2025-68659
Published: January 29, 2026
Vulnerability identifier: #VU122127
CSH Severity: Medium
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:Green
CVE-ID: CVE-2025-68659
CWE-ID: CWE-770
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 attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to allocation of resources without limits or throttling in username change endpoint. A remote user can pass specially crafted input to the application and perform a denial of service (DoS) attack.
How to mitigate CVE-2025-68659
Install updates from vendor's website.