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.