Description
Discourse is an open-source discussion platform. Prior to version 3.2.3 on the `stable` branch and version 3.3.0.beta3 on the `tests-passed` branch, Oneboxing against a carefully crafted malicious URL can reduce the availability of a Discourse instance. The problem has been patched in version 3.2.3 on the `stable` branch and version 3.3.0.beta3 on the `tests-passed` branch. There are no known workarounds available for this vulnerability.
References
https://github.com/discourse/discourse/security/advisories/GHSA-664f-xwjw-752c
https://github.com/discourse/discourse/commit/10afe5fcf1ebf2e49cb80716d5e62e184c53519b
https://github.com/discourse/discourse/commit/6ce5673d2c1a511b602e1b2ade6cdc898d14ab36
