Discourse is an open-source discussion platform. Prior to version 3.2.3 on the `stable` branch and version 3.3.0.beta4 on the `beta` and `tests-passed` branches, a malicious actor could get the FastImage library to redirect requests to an internal Discourse IP. This issue is patched in version 3.2.3 on the `stable` branch and version 3.3.0.beta4 on the `beta` and `tests-passed` branches. No known workarounds are available.
https://github.com/discourse/discourse/security/advisories/GHSA-46pq-7958-fc68
https://github.com/discourse/discourse/commit/67e78086035cec494b15ce79342a0cb9052c2d95
https://github.com/discourse/discourse/commit/5b8cf11b69e05d5c058c1148ec69ec309491fa6e