Discourse is an open source discussion platform. In versions prior to 2.8.1 in the stable
branch, users can trigger a Denial of Service attack by posting a streaming URL. Parsing Oneboxes in the background job trigger an infinite loop, which cause memory leaks. This issue is patched in version 2.8.1 of the stable
branch, 2.9.0.beta2 of the beta
branch, and 2.9.0.beta2 of the tests-passed
branch. As a workaround, disable onebox in admin panel completely or specify allow list of domains that will be oneboxed.
{ "cpes": [ "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*" ], "severity": "Medium" }